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Secrets of the Underground: 1x8
American Stonehenge
Rob Nelson investigates the mysterious pattern of rocks at the bottom of Lake Michigan known as Underwater Stonehenge. At the notorious Alcatraz prison, Rob uses state-of-the-art technology in search of rumored escape tunnels.
1 - 1Capone's Escape Tunnels Feb. 14, 2017- 1 - 2Mystery of the Serpent Mound Feb. 21, 2017
- 1 - 3America's Buried Massacre Feb. 28, 2017
- 1 - 4Rocky Mountain Monsters Mar. 07, 2017
- 1 - 5Great Lakes Bermuda Triangle Mar. 14, 2017
- 1 - 6California's Hidden Doomsday Mar. 21, 2017
- 1 - 7Secret History of the New World Mar. 28, 2017
- 1 - 8American Stonehenge Apr. 04, 2017
