The fictional Shawshank State Prison, in the 1994 movie The Shawshank Redemption (starring Tim Robbins, Morgan Freeman, and Bob Gunton), was located in Maine, however the building that was used for filming was nowhere near Maine, it was actually in a small town in Northern Ohio.
Run by the Mansfield Reformatory Preservation Society, it was the Ohio State Reformatory that was used for the filming of the movie.
Boasting the world's largest free standing cell block, 6 tiers high, with 600 cells, it hasn't been in full operation since 1972. The building was also used for scenes in the movies Tango and Cash, Air Force One, and Lil Wayne’s Go DJ music video.
You can actually tour the reformatory, and mrps.org offers tips for dining, lodging, and of course getting there.
In the news, the Mansfield Reformatory Preservation Society wants to rehabilitate a run-down property near the old prison for use as a rooming house for ghost-hunting visitors.