Ireland's Underground Alcatraz (S02E05)
S02E05
For more than 400 years, hidden military fortresses along the southern coast of Ireland have stood guard against invaders. Now, specialists delve into the dark history of how this formidable bastion evolved into a nightmarish prison, uncovering the grim realities that took place within its walls.
Show
Underground Marvels
Episode
S02E05
Air Date
Sep 02, 2021
Season 2 Episodes
S02E01
Hotel Bunker of the Apocalypse
S02E02
Mystery of the Kentucky Cave
S02E03
Cincinnati's Secret Caverns
S02E04
Buried Lab of the Black Hills
S02E05
Ireland's Underground Alcatraz
S02E06
Subterranean Silo Survival
S02E07
Italy's Subterranean Secret
S02E08
Grand Canyon's Lost Treasure
S02E09
Murder Raid Tunnels
S02E10
Medieval Maze of Secrets