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Mystery of the Kentucky Cave
Exploring the vast 400-mile Mammoth Cave in Kentucky, USA. Plus, a newly constructed opening into a metal mine in Wales - untouched for over 70 years.
Aired: Feb 07, 2022 Genre: DocumentaryDuration: 45m Rating: 0 Country: United Kingdom Production:
Episodes
01: Murder Raid Tunnels02: Grand Canyon's Lost Treasure03: Cincinnati's Secret Caverns04: Hotel Bunker of the Apocalypse05: Mystery of the Kentucky Cave06: Ireland's Underground Alcatraz07: Medieval Maze of Secrets08: Buried Lab of the Black Hills09: Subterranean Silo Survival10: Italy's Subterranean Secret