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12. Poveglia Island – Italy
Poveglia Island, near Venice, has a long history of death, insanity, and terror. During the bubonic plague days of the 18th century, Italians shipped their dying to this island to prevent the disease from spreading. A mental hospital operated there from 1922 to 1968, where legend has it that a doctor tortured and killed many of the patients. As many as 100,000 bodies may be buried on this tiny, demented island.