Secret Passages

America's Stonehenge (1x10)

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Ancient unexplained monoliths on the side of a New Hampshire hillside. Could this be a mysterious oracle chamber? hidden rooms inside a three-hundred year old farmhouse provide clues to the secret history of slaves in early America. Hidden staircases and hidden passageways reflect a designer's obsession for the unexpected. Mansions cling to a German hillside hiding miles of heavily armored tunnels and bunkers constructed beneath them.