

Mysteries of the Abandoned
Season 2
TV-PG
The world's most incredible engineering projects are revisited to uncover why places full of mysteries and untold secrets are now abandoned ruins.
8 Episodes
- Curse of the Haunted PrisonE2
Curse of the Haunted PrisonA mysterious American pyramid built out of Cold War paranoia, a haunted prison, and a strange cluster of structures in the Atlantic are mysterious deserted engineering projects, and new discoveries reveal how they were built and why they were abandoned. - Conspiracy on Devil's MountainE5
Conspiracy on Devil's MountainA secret structure on a sinister mountain, an industrial compound swallowed by a forest, and a mysterious run in a sand dune are strange deserted engineering projects, and new discoveries reveal how they were built and why they were abandoned. - Secrets of the Alien ShrineE6
Secrets of the Alien ShrineA strange alien shrine on a mountain peak, a bridge built in the Alaskan wilderness, and an American castle with a dangerous secret are mysterious deserted engineering projects. New discoveries reveal how they were built and why they were abandoned.