Few sounds are as chilling as the metal bars of a prison slamming shut. Often, criminals are locked up in cells with other murderers, thieves, and robbers--sometimes for years, sometimes for life. Yet what about being locked up with a ghost? Some people say that the souls of those who died in prison are unable to rest in peace. As a result, ghosts and other spirits are often reported to haunt jails and prisons around the world. Among the 11 prisons...