A forgotten city in the cliffs of Colorado and a desolate complex of windowless buildings in the Rust Belt now stand in ruins; experts investigate the secrets of these deserted American mysteries to uncover how they were built and why they were abandoned. This episode is a mashup of S07E08 "Ruins of the Rust Belt," S05E06 "Secrets of the Doomsday Caves," and S04E07 "Alien Hell Portal."
|Title:||Ruins of a Desolate Heartland|
|Air Date:||February 22, 2021|
Mysteries of the Abandoned Links
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