Mansfield Reformatory, Ohio

When it was built in 1886, at a cost then of $1.3 million, the Ohio State Reformatory (also known as the Mansfield Reformatory) was the largest reformatory in America. It evolved into a state penitentiary over time, and housed over 150,000 individual residents, as many as 3,500 at a time, from death-row inmates to adolescent petty thieves, before closing in 1990. The state built a modern correctional facility next door, and began tearing down the reformatory, before being stopped by local preservationists. Efforts are underway to restore the building, and it is used occasionally as a film location and for ghost hunts. Portraits of Lenin and Stalin loom over the central guard room, left from the filming of a Harrison Ford feature film, Air Force One. Set dressings from the film Shawshank Redemption are also visible inside.