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.

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.

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

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

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

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Discover major natural anomalies and varied human activities never investigated before.

The face of Christ is discovered in a field in Hungary and a photo that claims to show who shot down a passenger jet in Ukraine.

We investigate one natural phenomenon, four shapes that resemble human origin and monitor one example of human origin and current destruction.

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A drone pilot filming in a remote mountain range discovers ancient rock carvings pointing to the sky. Who were their mysterious creators and what are the strange beings they depict?

North Korea claims to have unleashed the power of the HB bomb. Can satellite surveillance of North Korea�s atomic weapon�s testing site determines whether they�re telling the truth?

A huge expanse of northern California is covered by strange regularly-spaced mounds which scientists cannot explain. Could they be connected to the mythical underground kingdom that local Indian legends describe?

NASA satellite data reveals the presence of vast previously unknown canyons beneath the Greenland ice cap. Could they hide buried secrets from the cold war? Or the remains of an ancient monster which once hunted these waters?

A satellite image of a strange shape beneath the waters of a pond in Byron Township, Michigan prompts a major investigation. What is the mystery object? How did it get there? Could it be a clue to a case that has baffled police for a decade?

Evidence of human activity is found in strange times and places and a new perspective on a biological activity known since the nineteenth century.

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Investigators find a new clue about the missing Malaysia Airlines flight that disappeared in 2014, and an astronaut spots something strange in the Sahara Desert.

An ominous shadow engulfs the Pacific Ocean and scientists have trouble explaining a strange lake that's shaped like a perfect circle.

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A heavily armoured force takes over one of Syria's most ancient archaeological sites, prompting fears that its relics are being stolen.