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Exploring hidden rooms, concealed stairways and underground labyrinths.
EP19 "America's Stonehenge"
In New Hampshire, a long stone passageway leads from ancient rock monoliths into a mysterious underground chamber.
EP15 "Shanghai Tunnels"
Criminals use the Shanghai Underground to run their operations.
EP22 "Underground Gardens"
Baldasare Forestiere builds a subterranean Shangri-La in California.
Exploring hidden rooms, concealed stairways and underground labyrinths.
Original Air Date: Apr 1, 2002
Rating: TVPG
Playback: HD
Available on