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The ghost towns of the twilight zone. America's secret starvation experiment. The atomic ice worm. Rome's mystery ancient megastructure and the Island that changed history.

Uncover a perfect circle carved around an ancient peak, a scary phenomenon in the Pacific and strange shapes in a Middle Eastern desert.

Investigate the secrets behind the Hadzabe Myth in Tanzania, visit Colorado's incredible Cheyenne Mountain Complex and check out a fascinating abandoned boat in Croatia.

Baffling stories of people who vanished without a trace, including a young Tasmanian pilot who is chased by unidentified aircraft before disappearing.

Thousands of UFO sightings and abductions are reported every year. This series examines these accounts and casts new light on historic cases.

The world's most haunted doll shows off its magic, a family in Oklahoma has a ghostly new roommate and a misty cryptid is caught on a security cam in the woods of Wisconsin.

Ghosts flock to a quaint coastal farmhouse. A pastor's sermon is interrupted by the Devil himself and a woman and her dogs have multiple terrifying encounters with Bigfoot.

The ghost towns of the twilight zone. America's secret starvation experiment. The atomic ice worm. Rome's mystery ancient megastructure and the Island that changed history.