A staircase in the Ohio State Reformatory, an old prison [and the filming site for The Shawshank Redemption]. Currently the prison offers self-guided tours to see the cell blocks and other rooms.
This is an abandoned building [I think a schoolhouse] in Ottawa, MN. It’s behind a chain link fence, so it’s tricky to photograph, but there’s a small gap in the fence so I could take a couple pictures from the front.