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Mysteries of the Abandoned Episodes
Season 2, Episode 1
Alien Nazi Hell Holes
A Russian hole to hell in the Arctic, a military base in America's wild west, and a strange looming tower are mysterious deserted engineering projects. Then the mystery of an abandoned alien Nazi structure and a Soviet monolith are revealed.
Season 2, Episode 2
Mystery Pyramid Conspiracy
A mysterious pyramid built out of Cold War paranoia, a haunted prison, and a cluster of structures in the Atlantic are mysterious deserted engineering projects. Then, the mystery of a secret structure on a mountain and an industrial compound are revealed.
Season 2, Episode 3
Deserted American Secrets
A deserted city in America's heartland, an eerie gigantic wall deep in snowcapped mountains, a deserted town in Spain and a mysterious top-secret Soviet facility are deserted engineering projects, but new discoveries reveal how they were abandoned.
Season 2, Episode 4
Alien Fortress
Alien shrine, a bridge in the wilderness, a castle with a secret. A sea fortress, a highway in the Amazon and a mysterious structure by the Statue of Liberty are engineering projects, and new discoveries reveal how they were built and why they were abandoned.
Season 2, Episode 5
Doomsday Ghost Town
New discoveries reveal an American ghost town in the Amazon jungle and eerie ghost ships stranded in an alien deserts.