Some of the world's most incredible engineering projects now lie in ruins. Get an inside look at these decaying places that are home to countless mysteries and untold secrets waiting to be rediscovered.
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West Virginia Penitentiary
According to the United States Department of Justice, the West Virginia Penitentiary in Moundsville, WV was one of the most violent prisons in operation until its closure in 1995. At its peak, it housed more than 2,000 inmates including the mother of the infamous cult leader and murderer Charles Manson.