Alcatraz Federal Penitentiary was once housed some notorious criminals, but even after the prison’s closure, it seems some of them were never released. Now notorious for being one of the most haunted prisons in America, the ghosts of Alcatraz are still alive and well— metaphorically speaking, of course. Recently, a team of researchers experienced the prison’s paranormal activity firsthand when they stayed overnight while working on a project to create a 3D map of Alcatraz Island.

Lists of “The World’s Most Haunted Places” would not be complete without the looming, castle-like specter of Eastern State Penitentiary. The imposing prison is remembered for its unique methods of criminal reformation, famous for its compelling paranormal activity, and also happens to be located in Philadelphia in our home state of Pennsylvania! Eastern State Penitentiary is an unmissable destination with a storied background - check out 10 horrible history facts about Eastern State Penitentiary, followed by our own quick impressions about our tour of the infamous prison!