Mysteries of the Abandoned

House of Horror (6x10)

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An eerie set of buildings in Paris is evidence of an unspeakable evil; new discoveries reveal the horrific things that happened here, and why they were abandoned. Stories: 1) Jardin D'Agronomie Tropicale, Paris, France; 2) Sandy Hook, New Jersey; 3) Purton Hulks, Purton, UK; 4) The Ostwall, Poland