Original subtitles

NARRATOR: Ancient monuments, deep underwater.

A once-thriving metropolis, now half a mile under the sea.

Lost cities submerged for thousands of years.

DAVID CHILDRESS: All over the world, there are sunken cities.

There's more than 200 known sunken cities

in the Mediterranean alone.

GRAHAM HANCOCK: What we're looking at

are the remains of cities at a time when mainstream

archaeology tells us there were no cities anywhere

in the world.

NARRATOR: Are underwater monuments examples

of mankind's earliest civilizations?

Or is there evidence of skills far

beyond that of primitive man, and if so, where

did it come from?

GIORGIO A. TSOUKALOS: The native legends

are very clear that something or someone landed, and then

knowledge all of a sudden spread.

JORGE LUIS DELGADO MAMANI: There's

many, many legends with lights coming from under the water.

DAVID CHILDRESS: You start to get the idea that there's

some kind of ancient alien underwater base.

NARRATOR: Millions of people around the world

believe we've been visited in the past

by extraterrestrial beings.

What if it were true?

Did ancient aliens really help to shape our history?

If so, what evidence lies deep underwater?

[THEME MUSIC]

NARRATOR: Covering more than 71% of the planet, the Earth's

oceans are a vast and largely unexplored mystery.

For most of recorded history, man

could only guess at what lay beneath the ocean surface,

but new technologies are reaching new depths.

Researchers around the world are finding

the unexpected, underwater complexes

and sophisticated monuments that defy

the conventional historical record.

MICHAEL CREMO: There are remains of urban civilizations on parts

of the earth that were exposed on land 10,000 and more years

ago, and this means that urban civilization is

far older by many thousands of years

than many scientists now believe possible.

NARRATOR: Scientific theory suggests

that during Earth's last ice age,

ocean levels were once much lower than they are today.

GRAHAM HANCOCK: You have to envisage a world in which there

are two mile deep ice caps sitting

on top of northern Europe and North America,

in which are accumulated enormous quantities of water.

And we know that this water began

to melt about 21,000 years ago and finished

melting about 10,000 years ago.

NARRATOR: As a result, rich coastal lands

were slowly submerged by rising sea levels.

GRAHAM HANCOCK: 10 million square miles of land

was flooded all around the world.

That's roughly the size of Europe and China

added together, were just rubbed from the record.

They just disappeared from the story, and in my opinion

archaeology is not doing enough work

to investigate those lost and submerged lands.

NARRATOR: While much of the ocean's floor

remains unexplored, for thousands of years,

philosophers and scientists have been

drawn to one of the greatest mysteries

of the sea, the legend of the lost city of Atlantis.

DAVID CHILDRESS: It's been said that more books have been

written about Atlantis than any other subject,

but most of what we know comes from the Greek philosopher

Plato, who wrote two books about Atlantis,

the Timaeus and the Critias.

NARRATOR: Written in 360 B.C., Plato

described Atlantis as a highly advanced city, ringed

by concentric walls, which flourished

9,000 years before his own time.

MICHAEL CREMO: There are descriptions

of huge palaces for kings.

It's stated that Atlantis had huge naval forces, which

it used to conquer other parts of the world.

It was an urban civilization.

According to the ancient Greek text,

Atlantis was connected with extraterrestrials

from the beginning.

It was founded by the Greek God Poseidon.

Poseidon can be regarded as an extraterrestrial

in a sense of not being this earth.

ERICH VON DANIKEN: Poseidon, one of the extraterrestrials

found a pretty wonderful young woman girl on Earth,

and he took this woman girl, made her pregnant

and to protect his new family, he founded Atlantis.

NARRATOR: According to the legend, after a failed attempt

to invade Athens, disaster struck the island.

DAVID CHILDRESS: According to Plato,

Atlantis was destroyed in a day and a night,

a cataclysmic destruction that sank

the entire island and its capital city.

Some researchers believe that the Atlantians somehow

destroyed themselves.

NARRATOR: According to Plato, Atlantis

was located in front of the pillars of Hercules,

a location beyond what some scholars attribute

to modern Gibraltar.

DAVID CHILDRESS: And to the ancients,

as they left the Mediterranean Sea to go into the larger

Atlantic Ocean, this was where they

went beyond the pillars of Hercules

between Spain and Morocco.

NARRATOR: Across the Atlantic lies

the island chain of the Bahamas, just southeast of Florida.

Here in 1968, archaeologist J. Manson Valentine

believed he found part of Atlantis

when he discovered an unusual rock

formation off the coast of North Bimini Island.

JOHN VAN AUKEN: It's only in about 12 to 18 feet of water

so you can view it easily.

At first, scientists thought this was just beach rock,

but then several other scientists exploring the Bimini

Road noticed that the beach rock was on top of other beach rock

with balancing stones wedged in between.

And they said, nature doesn't do that.

Man does.

And they realized, this is a harbor,

a breakwater for a harbor.

From the shallow edges of Bimini,

all the way to the Gulf Stream, in 300 feet of water

we have found many fascinating complexities

that look like remnants of ancient cities or structures.

Roads, pathways, structures covered in coral.

NARRATOR: Could the Bimini ruins be remnants of Atlantis,

and if so, could these roads lead

to other sites buried under sand and water?

In the year 2000, while mapping the seafloor

off the western coast of Cuba, a research expedition

led by Russian Canadian oceanographer Paulina Zelitsky

spotted symmetrical stone structures deep

below the water.

Remarkably, they were over a half mile down.

PAULINA A. ZELITSKY: Now we're just

going to do this kind of investigation

so we have to use remote operated vehicle.

And this vehicle is equipped with video cameras

and manipulators, and it's controlled

from the deck of the ship.

NARRATOR: The expedition was also

armed with side scan sonar equipment, used

to create images of large areas of the sea

floor and underwater objects.

PAULINA A. ZELITSKY: So I was in control room on board the ship,

and we were receiving that image coming from side scan.

And this is just one of the many other images

that we were obtaining of the 80 structures made

of large stones placed one on top of another

LINDA MOULTON HOWE: Well, what do they end up with?

It is an image that shows these rectangular, 90 degree

angles over and over and over on very large structures that

seem to have wide avenues.

NARRATOR: The exploration found huge stone blocks in pyramid

shapes, others more circular.

Most were gigantic, reaching 16 feet in height

and weighing several tons.

30 geometric structures emerged, appearing

to be the remains of streets, buildings, tunnels,

and pyramids, all at a depth of 2,200

feet below the surface of the water.

ANDREW COLLINS: We might well have here the evidence

of a prehistoric culture that would probably go back

tens of thousands of years, and that's very exciting indeed.

NARRATOR: Using dating techniques

based on the presence of nearby volcanic ash,

geologists estimated the underwater city sank over

6,000 years ago.

LINDA MOULTON HOWE: Could this be, a half mile down,

some part of the sunken Atlantis from 9,000, 10,000 years ago

that Plato talked about?

ANDREW COLLINS: Well, the Atlantis myth

is integrally related with the area of the Caribbean

and the Bahamas, in particular Cuba.

Plato talks about an island empire.

He's probably talking about dozens

of different islands of different sizes,

not just in the west Atlantic, but probably

stretching out right into the central Atlantic area.

NARRATOR: Both the Cuban and the Bahamian ruins

lie on the western edge of the Bermuda Triangle,

an area of ocean covering over 500,000 square miles,

known for magnetic anomalies, extraterrestrial sightings,

and unexplained disappearances of aircraft and ships.

Could there be a connection between Atlantis

and the area known as the Devil's Triangle?

BILL BIRNES: On the edge of the Bermuda Triangle,

there are underwater ruins of the ancient city of Atlantis,

the prehistoric city of Atlantis.

So yes, there is a theory that Atlantis

lies not near Greece, but in the Bermuda Triangle.

NARRATOR: If Plato's texts are true,

then other Greek myths may provide

a hint of the true fate of Atlantis.

One myth tells of the Titan goddess

named Asteria, who fell from the sky and became an island.

GIORGIO A. TSOUKALOS: In ancient Greece,

we have a number of myths, which describe islands,

bronze gleaming islands, that fell from the sky

and landed in water.

I don't think that Atlantis, therefore,

was an actual stationary physical island.

Atlantis, according to Plato, disappeared in one night

with a lot of fire and a lot of smoke.

See, I don't think that Atlantis sank.

I think Atlantis lifted off.

NARRATOR: Was Atlantis a safe haven for ancient aliens

before the end of Earth's last ice age,

and if so, could there be other alien cities

submerged deep underwater?

Yonaguni, Japan.

This small island is at the western most

tip of the Japanese archipelago.

Scholars believe the first inhabitants migrated here

from Southeast Asia during prehistoric times.

In 1987, in nearby waters, dive tour operator Kihachiro Aratake

made a shocking discovery.

A massive complex of stone formations

lay hidden a mere 60 feet beneath the ocean surface.

Experts call it one of the greatest discoveries

in the history of underwater archaeology.

GRAHAM HANCOCK: What's intriguing

about the complex at Yonaguni is that there are

a whole range of monuments pretty much side by side,

and this to my mind looks unmistakably to be

the work of human beings, not the random action of the ocean

on differential layers of stuff.

MASAAKI KIMURA: [SPEAKING JAPANESE]

TRANSLATOR: There are several reasons

why I think this is not a natural formation.

A number of tools and numerous engraved stones

were found at the site.

Because of these things, there is no doubt to me

that this was made artificially.

NARRATOR: Submerged beneath 60 to 100 feet of water,

the largest of the formations resemble

a massive, five-layered stepped pyramid

the size of two football fields.

DAVID WILCOCK: You see unambiguous carvings

that clearly are geometric in nature, tons of right angles.

We see channels that you can walk through,

with stairwells at the end that are

perfectly rectangular in shape.

GRAHAM HANCOCK: There are places where

you find megaliths piled on top of one another

to create a tunnel through which you can swim.

There is a set of megaliths positioned side

by side against the side of the cliff.

There's a gigantic human face carved underwater.

MASAAKI KIMURA: [SPEAKING JAPAN]

TRANSLATOR: There is a stone in which

is carved a face almost 23 feet tall.

Our first impression was that it looked a lot like the moai

on Easter Island.

Then we began to realize that it strongly

resembled the Sphinx, which guarded the pyramids.

We wondered if that might be the function

the face is also serving here.

GRAHAM HANCOCK: It's the whole combination

of all these structures together which convince me

that we're looking at a ceremonial complex.

The mystery surrounding the Yonaguni underwater structure

is when did it go underwater?

The geological evidence is that it

was submerged during the meltdown of the last ice age.

GIORGIO A. TSOUKALOS: All around the world, whether it

is France, India, or Japan, there

are man-made structures that lie underwater.

Two ways of how our ancestors could have done this.

Either they had scuba gear-- I don't think so--

or this stuff was built when the ocean levels were lower,

and that was over 14,000 years ago.

And 14,000 years ago, according to mainstream archaeology,

we were just dwelling in caves, hunter gatherers.

NARRATOR: Could the Yonaguni structures

have been built by such primitive people,

and what evidence exists of the people who

inhabited this island?

MASAAKI KIMURA: [SPEAKING JAPAN] TRANSLATOR:

Human fossils were found so I'm sure there were people living

on the island, but there's some question about whether or not

they had the technology to create

structures or anything like this.

GRAHAM HANCOCK: It's not so much the question

of could the stone have been chipped away and removed.

It's a question of the vision, of the scale of the complex,

of thinking in those kind of terms,

and we know of no other Stone Age

culture that thought in those kind of terms

of creating a gigantic seemingly ceremonial complex.

NARRATOR: If, according to scholars,

the ancient Japanese people could not

have built this monument, who did, and how did it get here?

BILL BIRNES: Speculation is that extraterrestrials

created the Yonaguni monument.

The engineering is just beyond the capacity

of Stone Age civilizations.

NARRATOR: Ancient astronaut theorists also

believe the key to the Yonaguni mystery

is found in its global positioning.

Strangely, the complex lies within an area

of the Pacific long suspected of extraterrestrial activity.

It's called the Dragon's Triangle.

DAVID WILCOCK: Just south of Japan

you have a mysterious area called the Dragon's Triangle,

which is very similar to the Bermuda Triangle

because you have planes that have disappeared

from the air, ships that have disappeared from the ocean.

In fact, Japan has declared this is a disaster area.

Don't fly through it.

Stay the heck away.

Because if you go in there, terrible things

can happen to you.

BILL BIRNES: In ancient Japan and even

into the relatively modern era, there

are stories about the dragon sea in which objects rise out

of the water and sail through the air.

In ancient Japan, these were winged monsters breathing fire.

In more modern times, these took on the appearance

of actual machines.

When you compare those descriptions

of these devices with the description

that Columbus came back of a craft nearing the Bermuda

Triangle actually rising out of the water, a light that

followed the ship, you realize there's

a similarity in both of these locations to things, objects,

that are in the water and rise out of the water

and fly through the air.

NARRATOR: But why are the two submerged structures

found within the perimeter of these strange regions

of the planet where so much unusual activity occurs?

Is it coincidence that the earth's 25th parallel north

cuts through both the Bermuda Triangle and the Dragon's

Triangle?

BILL BIRNES: They lie on a plane along the same line,

and both of them have the same magnetic phenomena,

in which compass bearings are lost, instruments go down.

People wonder if there's a real strange UFO connection.

GIAN J. QUASAR: If UFOs and flying saucers do exist,

then we should suspect that they could originally

come from an ancient super civilization.

It makes you wonder if flying saucers, UFOs, whatever

you want to call them, actually used the area of the Triangle

as their major base and perhaps even coming back

to the remnants of a civilization

that they were familiar with.

NARRATOR: What if the sunken monuments at Yonaguni

and near Cuba had alien origins?

Might they have been used as alien bases,

and if we believe extraterrestrials functioned

on land, could they have also functioned underwater?

Could there be more evidence lying in the vast Pacific?

As an island nation, it should come as no mystery

that much of Japan's rich history

is tied to the waters of the Pacific Ocean.

But although many of Japan's legends

are largely unknown to the West, some

are drawing the attention of ancient astronaut theorists.

One such legend dates back to 1803

and traces its origins to a beach north of Tokyo.

DAVID WILCOCK: Allegedly, a craft

that was quite large in size washed up

on the shore in Japan.

KAZUO TANAKA: Strange, round ship

drifted ashore in this area.

DAVID WILCOCK: The woman did not speak

any language they could identify.

There were written inscriptions inside her craft

that they could not identify.

And she's clutching this box that she

didn't want anybody to touch.

NARRATOR: Known as the legend of Utsuro-bune, or hollow ship,

the details of the story have puzzled

historians for centuries.

Where, for example, did the mysterious hollow ship

come from?

Could it have come from the area of the submerged Yonaguni

monument?

Who was the strange woman?

And what were the contents of the box she

guarded so carefully?

Was it a human head?

Or was it, as some ancient astronaut theorists believe,

a type of brain or other form of extraterrestrial intelligence?

If so, could it have been intended as a gift

to the early Japanese by an ancient space traveler?

DAVID WILCOCK: There's five different drawings

that have survived from completely

different regions of Japan.

They're almost identical to modern UFO reports.

NARRATOR: As evidence to support their claims,

ancient astronaut theorists point

to early Japanese carvings and statuary,

each suggesting a variety of extraterrestrial encounters.

GIORGIO A. TSOUKALOS: This is a dogu figure.

It comes from Japan.

Even to the untrained eye, you look at this,

and it's as if this being is wearing

some type of a suit with a helmet, some goggles.

On the back, there are all these weird buckles and circles,

straps, very similar to a modern day space suit.

In my opinion, this is a likeness

of a possible extraterrestrial that

visited Earth thousands of years ago.

NARRATOR: Archaeologists have catalogued the existence

of more than 15,000 dogu figures made

during the Jomon period of prehistoric Japan,

dating from approximately 14,000 to 300 years

B.C. But could, as ancient astronaut theorists believe,

these strange dogu figures really be

a primitive interpretation of a pressurized space

suit or diving apparel.

GIORGIO A. TSOUKALOS: The story behind those dogu figures

is very clear, and anyone can go and read

translations of the ancient texts

that the dogu, a long time ago, descended from the sky

and taught the first Japanese people in various disciplines.

-And the whole Japanese culture, including the kimono, the tea

ceremony, the use of wasabi and ginger

for eating sushi, the way that they built

their architecture, the written language, everything, they say,

came from these visitors, from these gods, from the universe.

ERICH VON DANIKEN: The picture shows

beings who look like astronauts.

They are dressed like an astronaut.

They have the helmet of an astronaut.

They have some strange tools in their hands,

tools which we do not understand.

Now there is a link.

The Japanese call it dogus.

In North America, we have still the Hopi tribe in Arizona,

and the Hopi Indians are still making today Kachina dolls.

Kachina dolls look similar to the Japanese dogu figures.

Further back, in the Sahara desert, Africa,

we found cave paintings.

When you see the picture, you see definitely

an astronaut suit.

No doubt, absolutely.

Now you compare these cave paintings

with the Kachina dolls of the Hopi

and with the dogu of Japan, you have one line.

NARRATOR: Do the mysterious dogu figures provide

tangible evidence of extraterrestrial encounters

in Japan's ancient past, and does

the legend of the Utsuro-bune suggest that the Earth's oceans

may be hiding even more proof of alien contact.

Perhaps the answer can be found deep in the waters

off the coast of India.

In 2001, researchers from India's oceanic institute

detected anomalies on the bottom of the Gulf of Khambhat,

seven miles from shore.

They had been commissioned by the Indian government

to do a survey of pollution in the Gulf of Khambhat,

up in the northwest of India, and they were not

expecting to find anything except a mess down there.

But suddenly, their side scan sonar

started returning images of regular structures.

NARRATOR: The images revealed an enormous network

of stone buildings, now shrouded in mud and sand

and covering an area of five square miles.

GRAHAM HANCOCK: What we're looking

at in the Gulf of Khambhat are the remains of cities.

There's actually two of them.

And it turns out that they are positioned

on the side of ancient river channels.

They look like cities that have been submerged

for a very long time at a time when mainstream archaeology

tells us there were no cities anywhere in the world.

NARRATOR: Powerful cross currents

made it nearly impossible to dive

the 170 feet to the bottom.

Still, scientists retrieved dozens of artifacts,

including word and pottery shards.

MICHAEL CREMO: Some of the dates on some of the human artifacts

that were brought up extended as far back as 32,000 years,

but the oceanographers concluded that the area had

been covered by water about 9,000 years ago.

So this city had apparently existed from 32,000

to about 9,000 years ago.

DAVID CHILDRESS: Mainstream scholars today

claim that ancient Indian civilization only

goes back 4,000 or 5,000 years, yet Hindus dollars themselves

say that Hindu civilization is going back many tens

of thousands, even hundreds of thousands of years.

NARRATOR: Might the ruins below the Gulf of Khambhat

prove the Hindu scholars right?

Another recent discovery may support their claims.

200 miles to the northwest lies the modern city of Dwaraka.

Archaeologists digging deep under the city

found signs of a settlement once inundated by the sea.

Inspired by this clue, they began

searching for more ruins in waters just off the coast.

In only 70 feet of water, divers discovered sandstone walls,

cobblestone streets, and evidence

of a prosperous seaport.

Scholars declared these ruins to be

the remains of the ancient and legendary city of Dwaraka.

Ancient Hindu texts explain that the legendary city of Dwaraka

was said to be the dwelling place of Lord

Krishna a deity worshipped across many traditions

of Hinduism.

GIORGIO A. TSOUKALOS: Imagine what

it would mean for the Christian world

to all of a sudden discover the actual holy grail,

the actual ark of the covenant.

That would be akin for the Indian population

to discover an actual Dwaraka.

This was a very powerful city, which

was ruled by Lord Krishna, and Krishna

is still revered until today.

He's one of the highest gods that we have in Hindu culture.

NARRATOR: Hindu texts explain that a king named

Shalva attacked Lord Krishna in the mythical Dwaraka.

Ancient astronauts theorists believe

the descriptions of the battle suggest

the use of alien technology and even spacecraft.

MICHAEL CREMO: According to the ancient Sanskrit text,

with this spacecraft, Shalva attacked the city,

raining down energy weapons that resembled lightning.

He destroyed large parts of the city in this way.

When this happened, the king of the city, the god Krishna,

responded by firing weapons at this spacecraft.

The weapons are described as arrows,

but they're not ordinary arrows.

It said that they roared like thunder

when they were launched and resembled

bolts of lightning or rays of the sun.

In response, it is said that the spacecraft began

to appear in different places simultaneously.

It appeared to be moving in ways that

resemble modern descriptions of UFOs.

So what I find interesting about this account

is there's a spacecraft made of metal

that is firing down weapons on a city on Earth.

NARRATOR: The legend says that Krishna eventually

departed Earth, and the ocean consumed his city of Dwaraka.

MICHAEL CREMO: For many people, the description

of fabulous ancient cities and the Sanskrit writings of India

were simply mythology, but with the discovery

of the remains of a sunken city off the coast

of India in the location of Dwaraka, all that has changed.

People are beginning to look at these ancient writings

in a new light and see them not simply as mythology,

but as actual historical records.

NARRATOR: Did India's ancestors witness

a war between extraterrestrial entities?

If the mythical city cited in the Hindu texts

turned out to be real, could there also

be evidence of Krishna and his supernatural powers?

Ancient alien theorists believe a link

between the submerged ruins and extraterrestrials

can be found in another set of texts

known as India's Sangam literature.

MICHAEL CREMO: Sangams were assemblies of sages.

It says that the first two Sangams

took place on a sunken land mass called Kumari Kandam.

This area was once above water, thousands of years

ago according to the accounts, but it's now underwater.

It's also interesting that these assemblies of sages

included extraterrestrial beings as well.

And this fits in with evidence discovered

in the Gulf of Khambhat and off the coast

of the present city of Dwaraka.

NARRATOR: Are the interpretations

of India's ancient texts proof of alien contact

in Earth's past?

And are the descriptions of gods actually

descriptions of extraterrestrials?

Perhaps another discovery, one beneath a mysterious lake,

will yield even more evidence of alien visitors

in the remote past.

The Andes Mountains, Peru.

Here, at an elevation of 12,500 feet,

lie the dark waters of Lake Titicaca, the highest navigable

body of water in the world.

In August of 2000, an Italian team

of divers and archaeologists launched

an underwater investigation of the legendary lake.

There, submerged under 100 feet of water,

the team uncovered traces of a paved road, a stone terrace,

and a wall nearly a half mile long.

For centuries, local legends have

spoken of a lost underwater city called Wanaku.

Could these ruins provide proof that such a city

did in fact exist?

Then, another shocking discovery.

Lying on the lake bed was a large sculptured stone head.

Could this ancient relic offer a clue

to the origins of this incredible archaeological find?

Comparisons were quickly made to similar stone work found

at the nearby ancient city of Tiwanaku, just 12 miles south

of Lake Titicaca, a city long thought by ancient astronauts

theorists to have extraterrestrial origins.

DAVID CHILDRESS: When the early conquistadors

talked to the local Amarra Indians,

they were told that giants at the beginning of creation

had created Tiwanaku.

The Spanish, too, were amazed by the gigantic blocks of stone.

They felt that the devil had built this building.

GRAHAM HANCOCK: If you look at some of the rock cut

and megalithic structures in the site of Tiwanaku,

I personally believe very strongly

that we are looking at an older episode of construction

and the traces of a forgotten episode in the human story.

NARRATOR: But if the ruins found at the bottom of Lake Titicaca

are from the legendary lost city of Wanaku, what happened to it?

Did it fall prey to a major earthquake

or other natural disaster?

Or was this city, as some ancient astronaut theorists

believe, deliberately flooded?

DAVID CHILDRESS: The more you know about Lake Titicaca,

the stranger it gets.

Archaeologists have problems in really explaining

why there are sunken ruins there because they're

saying that the ruins aren't that old,

they're only 1,500 years old.

And that would mean that Lake Titicaca has

gone through a number of major changes in that period.

And it's possible that somehow the lake itself

and the shorelines were manipulated

so that certain areas of Lake Titicaca

were flooded in a sort of artificial way.

There is a type of seahorse that lives in Lake Titicaca,

and seahorses are coming from salt water and oceans.

Yet these seahorses are living at nearly 13,000 feet

in the Andes.

NARRATOR: But just how could an ancient people

have artificially created South America's largest

lake, a lake that is 118 miles long and 50 miles wide?

GIORGIO A. TSOUKALOS: When you ask the local population,

how did all of this come into being,

the Amarra Indians will tell you that all of this

has existed since before the beginning of time.

JORGE LUIS DELGADO MAMANI: In the Amarra legends,

the lake is like the place of Genesis, the place where

it starts, all the civilizations in our continent.

These very, very old roads.

I mean, we're not talking only about this civilization,

this humanity.

We're talking about our seeds, the roots in the stars.

Some people believe that extraterrestrials built,

but what I believe is that the space brothers help us, direct

us, teach us, because they had the experience in many ways.

The legend says that once the space brothers came

to this planet, and they used to live with us.

And they was very important in our lives,

and they used to be very powerful people.

NARRATOR: But is it possible that the lost city of Wanaku

was really built or inhabited by the ancient ancestors

of the indigenous Amarra people?

And if so, could it have been deliberately

flooded to avoid detection from the outside world?

-[SPEAKING FOREIGN LANGUAGE]

TRANSLATOR: The elders, they used

to talk about the underwater city.

They talk about the lights like stars connecting with the lake.

The stars, when they come down to the lake,

there are changes in the temperatures.

-[SPEAKING FOREIGN LANGUAGE]

JORGE LUIS DELGADO MAMANI: There are many legends

with lights coming from the underground of the lake.

It seems they come, they go, and they

return in the different moments.

DAVID CHILDRESS: You'd start to get the idea that there's

some kind of ancient alien underwater base,

and it's possible that some of these sunken ruins

are somehow part of that base.

NARRATOR: Could the ancient city of Wanaku

really have been built by alien visitors, and if so, why?

What was their purpose?

Could the discovery of this and other sunken cities

provide the evidence that mankind

has been seeking for centuries, evidence

that proves we are not alone?

GRAHAM HANCOCK: These mysterious underwater structures

really don't have any context or any background

but just seem to come from nowhere.

They seem to stand out as being out of place in time

so there's some question marks, some mysteries surrounding them

that might shed new light on human history.

GIORGIO A. TSOUKALOS: Atlantis, Lake Titicaca, Dwaraka.

All those ancient mystery places always

have had a connection to the gods, the gods who

in the ancient astronaut opinion were flesh and blood

extraterrestrials.

And in the end, the ancient astronaut theory

will be proven right.