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TVGHDSecret Passages1hStory Television
Criminals use the Shanghai Underground to run their operations.
Criminals use the Shanghai Underground to run their operations.
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Secret Passages
EP19 "America's Stonehenge"In New Hampshire, a long stone passageway leads from ancient rock monoliths into a mysterious underground chamber.
Secret Passages
EP15 "Shanghai Tunnels"Criminals use the Shanghai Underground to run their operations.
Secret Passages
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
Genres: DocuseriesTV Series
Rating: TVPG
Playback: HD
Available on