Eastern State Penitentiary in Philadelphia is a mecca for Urbex photography though it is a historical site and museum. The penitentiary was built in 1829 and continued operations until as recently as 1971 (hard to believe the amount of decay since then). When the building was erected, it was the largest and most expensive public structure ever constructed, quickly becoming a model for more than 300 prisons worldwide. One of the revolutionary intentions of the time was the idea that inmates were to be reformed rather than be punished (thus the word penitentiary rather than prison). In fact, the warden was legally required to visit every inmate every day as a form of rehabilitation. Two of the more famous inmates were Al Capone and Willie Sutton. This image is of one of the barber chairs that still can be found in the building. The urban decay is evident on the walls along with the algae growing down the right wall.