#8 Eastern State Penitentiary, Pennsylvania, USA
When notorious criminals such as Al Capone and Willie Sutton were held there, you know you have a historic landmark in front of you. Operational until 1971, it was famous for its solitary confinement system: inmates lived alone, ate alone, and were even hooded whenever they had to leave their cell. As with most abandoned places, it has been transformed into a haunted house, and its authentic environment makes for an instantly immersive experience.