#4 – The Ridges
Originally known as the Athens Lunatic Asylum, The Ridges was renamed after the state of Ohio acquired the property. The hospital saw hundreds of lobotomies, and often declared masturbation and epilepsy to be the causes of insanity in patients.
Athens, Ohio, is listed as the 13th most haunted place in the world, as per the British Society for Psychical Research. The nearby Ohio University (which currently owns most of the property on which the Ridges is located) is said to be heavily haunted. The notorious rapist with Dissociative Identity Disorder, Billy Milligan, was housed at the facility for years. The most famous story, however is that of a 54 year old female patient who ran away and was missing for 6 weeks. She was found dead in an unused ward. She had taken off all of her clothes, neatly folded them, and laid down on the cold concrete where she subsequently died. Through a combination of decomposition and sun exposure, her corpse left a permanent stain on the floor, which is still visible today. Her spirit now haunts the abandoned ward.