E3 • Episode 3

E1 • Episode 1

A massive tsunami hundreds of feet high that never touches land; a secret underground base in China; an image from space may have revealed the location of the Garden of Eden.

42m • 2015

A massive tsunami hundreds of feet high that never touches land; a secret underground base in China; an image from space may have revealed the location of the Garden of Eden.

E2 • Episode 2

Weird barren rings in the Namib Desert, an island the size of Manhattan that vanishes without trace and a lost city in the heart of the Amazonian jungle.

42m • 2015

Weird barren rings in the Namib Desert, an island the size of Manhattan that vanishes without trace and a lost city in the heart of the Amazonian jungle.

E3 • Episode 3

First seen from space in 1965, the Eye of the Sahara is a beautiful 25-mile structure, but how it formed remains a mystery.

42m • 2015

First seen from space in 1965, the Eye of the Sahara is a beautiful 25-mile structure, but how it formed remains a mystery.

E4 • Episode 4

NASA astronaut Mike Barratt describes photographing a strange ring in the ice on the world's oldest lake from the International Space Station.

42m • 2015

NASA astronaut Mike Barratt describes photographing a strange ring in the ice on the world's oldest lake from the International Space Station.

E5 • Episode 5

A possible smoke screen over North Korea worries military analysts while an amateur archaeologist makes an extraordinary discovery.

42m • 2015

A possible smoke screen over North Korea worries military analysts while an amateur archaeologist makes an extraordinary discovery.

E6 • Episode 6

Images of Earth show cities glowing, while wilderness remains dark. Why is the Australian outback illuminated like a vast city?

42m • 2015

Images of Earth show cities glowing, while wilderness remains dark. Why is the Australian outback illuminated like a vast city?