NARRATOR: Antarctica is a land of extremes.
Nearly 98% of the ground is covered by an ice
sheet up to 3 miles thick.
A mountain as towering as Japan's
Mount Fuji at 12,400 feet would not even break the surface.
Temperatures regularly fall below minus 50 degrees
Fahrenheit, with winds of up to 200 miles an hour.
During its peak season, it is home to only 4,000 scientists
and military personnel.
Antarctica is the last frontier.
It holds our imagination.
Old maps that said, "Here be monsters."
The last remaining territory on the planet that could have such
a designation is Antarctica.
NARRATOR: Although it was discovered nearly 250 years
ago, scientists have more questions than answers when it
comes to this frozen continent.
Due to the sheer depth of the ice covering its landmass,
the surface of Antarctica is unable to be
seen with the naked eye.
And ancient astronaut theorists propose
that it is not just the geology that is hidden from us.
They suggest there is far more human and perhaps nonhuman
activity happening in Antarctica than we've been told.
Something seems to be going on on this mysterious continent
at the South Pole.
And it has been theorized by a number of people
that Antarctica is some kind of alien base.
NARRATOR: Rumors of extraterrestrial activity
in Antarctica have circulated for years.
If these accounts are true and there is, in fact,
an extraterrestrial presence in Antarctica today,
could it have been there for hundreds
or even thousands of years?
In July 2018, Linda Moulton Howe interviewed a whistleblower
who offered to provide her with classified information
regarding Antarctica on the condition
that she not reveal his identity.
Her source, a retired Navy SEAL who she identifies as Spartan
1, provided her with details of an ancient structure
he claims to have visited during his time at the South Pole.
At that time, my rank was first lieutenant commander
of Naval Special Operations.
We were inbound to southeast coast of Antarctica.
We were dispatched for--
unofficially, it was a research reconnaissance mission.
Officially, it was to find a certain individual,
obtain any information, and bring it back.
LINDA MOULTON HOWE: What was the date?
August of 2003.
NARRATOR: According to Spartan 1, when he and his team
reached their destination, they encountered
a large octagonal structure protruding from the ice.
Cautiously, they proceeded to enter it.
SPARTAN 1: At the very top of the first structure
that we entered, there was almost 18 feet
poking from the ice.
The rest of it was hidden under the ice.
Each door was the same, anywhere from 18 feet
thick to around 30 feet thick.
And even though these doors were that thick and that heavy,
you could take one finger and push them and they would open.
There was no resistance whatsoever.
The outside temperature was at least 40 degrees below zero.
Once you stepped inside these structures,
the temperature was an ambient 68 to 72 degrees.
SPARTAN 1: It was lighted from the inside,
but we could not find the source of light.
It was a lime green in color.
The walls were lined with what I call
hieroglyphics, but nothing of hieroglyphics
that I've ever seen in my life.
NARRATOR: Could there really be mysterious structures buried
at the South Pole, structures built
by an advanced extraterrestrial civilization
in our remote past?
Buried underneath the ice in Antarctica
could well be stone temple constructions.
There could be biological material,
remains of beings that lived there and could still be there.
It could be the greatest reveal in all of human history.