A search for an underground escape route said to have been used by Al Capone. Also: who or what built earthen mounds in Washington state.
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Episode: 1 Capone's Escape Tunnels
Episode: 2 Mystery of the Serpent Mound
Episode: 3 America's Buried Massacre
Episode: 4 Rocky Mountain Monsters
Episode: 5 Great Lakes Bermuda Triangle
Episode: 6 California's Hidden Doomsday
Episode: 7 Secret History of the New World
Episode: 8 American Stonehenge
