Grand Canyon's Lost Treasure (S02E08)
S02E08
More than 200 feet below the Arizona surface sits North America’s largest dry cave system. Experts delve into this expansive underground labyrinth to uncover its secrets and the hidden treasures that lie within its depths.
Show
Underground Marvels
Episode
S02E08
Air Date
Sep 23, 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