Philadelphia is the largest city in Pennsylvania, and the second largest city on the US east coast. It is known as the birthplace of the USA, as the Declaration of Independence was signed here.
Eastern State Penitentiary was based on the principles of reform rather than punishment. When the building was erected in 1829 it was the largest and most expensive public structure ever constructed in the United States. The prison was a big tourist attraction, and bacame a prototype for more than 300 prisons worldwide.
Lancaster was the capital of the United States for one day, September 27, 1777. The Second Continental Congress met here while fleeing the British who had captured Philadelphia.