Eastern State Penitentiary in Philadelphia, Pennsylvania, was one of the most expensive and well-known prisons in the world.
Built in 1829, the prison housed big-name criminals like Al Capone and bank robber “Slick Willie.”
Up until overcrowding became a problem in 1913, prisoners were kept in complete solitude at all times. Even when prisoners left their cells, a guard would cover their head so they couldn’t see and no one could see them.
Today, the decaying penitentiary offers ghost tours and a museum. Shadowy figures, laughter, and footsteps have all been reported as paranormal activity within the prison walls.