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10 Episodes
S2 E1 - Hotel Bunker of the Apocalypse
S2 E2 - Mystery of the Kentucky Cave
S2 E3 - Cincinnati's Secret Caverns
S2 E4 - Buried Lab of the Black Hills
S2 E5 - Ireland's Underground Alcatraz
S2 E6 - Subterranean Silo Survival
S2 E7 - Italy's Subterranean Secret
S2 E8 - Grand Canyon's Lost Treasure
S2 E9 - Murder Raid Tunnels
S2 E10 - Medieval Maze of Secrets
Streaming, rent, or buy Underground Marvels – Season 2:
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Synopsis
Experts explore mysteries of abandoned subterranean phenomena around the world, sharing their impressive stories, unique origins and the secrets they still keep hidden underground.
