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Hidden Beneath the Cities

Documentary

Scientists uncover a city, a chamber, and a complex, and map a tunnel network.

Friday, 24 April 2 airings
22:00
National Geographic Channel
S1 E1 · Underground Cities and Secret Chambers
23:00
National Geographic Channel
S1 E2 · Crystal Cathedrals and Buried Bunkers
Saturday, 25 April 2 airings
01:00
National Geographic Channel
S1 E1 · Underground Cities and Secret Chambers
02:00
National Geographic Channel
S1 E2 · Crystal Cathedrals and Buried Bunkers