TV-PG
65%Underground Marvels
Oct 17, 2019 45 min avg S1 E4
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Description
tvDocumentary
Historians, engineers, and experts take a look at the underground structures, systems, and phenomena that exist beneath our feet.
Episode 4The Renegade's Lair
A strange underground system known as the Black Cave was home to an infamous nobleman on the run from the law; today, experts investigate the secrets he left here to discover new parts of this mysterious network.
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