What on Earth?

Satellite images capture a giant symbol mysteriously carved into the expanse of Australia's Great Victoria Desert; an investigation reveals a secret nuclear weapons-testing cover-up by the British government with numerous aboriginal casualties.

Satellite images capture unsettling evidence behind zombie graveyards, enigmatic ghost towns, and unexplained death cults; experts use cutting-edge technology to investigate and reveal the dark truth behind these menacing mysteries of evil.

Satellite images capture bizarre groups of circular structures in the remote forests of Derbyshire, England; experts investigate and uncover ancient burial mounds linked to a Viking invasion that changed the course of English history.

Satellite images capture mysterious stone structures spread across high elevations of the Arizona mountains; experts investigate and uncover ruins of a 19th century Apache fortification linked to the most treacherous migrant route in U.S. history.

Satellite images capture a strange castle-like structure hidden in Scotland's dense and remote woodlands; expert archaeologists investigate and uncover an area with a bloody history linked to the birthplace of the world's oldest secret society.

Satellite images capture a bizarre pattern of rocks in the shape of a large fingerprint on a remote Swedish island; experts investigate and uncover a mysterious labyrinth with links to ancient Viking black magic and dark, mystical rituals.

Satellite images capture a bizarre pattern of large concentric circles formed in a remote English forest; experts investigate and uncover a top secret experimental bomb testing site critical to WWII British weapons development.

Aerial drone imaging captures a sophisticated complex of lost, ancient Roman buildings in Yorkshire, England.

Satellite images capture a gigantic oval among a bizarre grid pattern that's carved into the dense forests of New Jersey; experts investigate and reveal a landscape linked to infamous prohibition activity and a prolific WWI munitions factory.

Satellite images capture a mysterious collection of sprawling towns that appear to be completely unoccupied in Belarus; experts investigate and uncover a horrendous state-sanctioned cover-up responsible for claiming thousands of innocent lives.

Satellite images capture a bizarre, cone-like structure perched on the summit of a mountain range in Turkey; experts uncover one of the most extraordinary engineering projects of the ancient world linked to the legacy of a living deity.