The Athens Mental Hospital, located in Athens, Ohio, opened its doors in 1874 and over the years adopted a few different monikers, including the Athens Hospital for the Insane, and it stayed in operation until 1993. By the 1950’s, the hospital was treating more than 1,800 patients at once, and became famed for the infamous lobotomy procedure and housing violent criminals. Over time, the hospital became known as The Ridges, though its history has been somewhat shrouded in mystery.
The mystery is largely due to the fact that any information about patients is kept under tight wraps, with special permission needed from the state of Ohio to gain access. There are also more than 1,900 people buried on the grounds, with their headstones marked by number only, no names attached. Eventually, a large portion of the grounds was given to Ohio University.
One thing that gives this hospital an extra creep factor is the 1978 disappearance of a female patient. Her body was found a year later in an abandoned ward, and you can still see a stain on the floor where her corpse was found, more than three decades later.