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Watching: Underground Worlds
8.0•2019-09-25•2 Seasons
Season 2
Episode 3
Episodes
EP 1
Murder Raid Tunnels
EP 2
Grand Canyon's Lost Treasure
EP 3
Cincinnati's Secret Caverns
EP 4
Hotel Bunker of the Apocalypse
EP 5
Mystery of the Kentucky Cave
EP 6
Ireland's Underground Alcatraz
EP 7
Medieval Maze of Secrets
EP 8
Buried Lab of the Black Hills
EP 9
Subterranean Silo Survival
EP 10
Italy's Subterranean Secret
Overview
British documentary series exploring incredible feats of human endeavour underground, revealing what people have built, where they have built it, how and why.