We were new to the historic district in Philly and knew only what was available on the "net". A must first stop is the outstanding visitors center where you receive a super introduction to the district by the park rangers. These folks made our visit even better than we could have asked for. All questions answered promptly and with a smile. The locations we visited were clean, and easy for us senior citizens to get around. My only advise to other senior citizens, if you hope to visit the Liberty Bell, go on line to find a time when there are no school trips planned, otherwise it is a long wait without benches to ease you "aching back" :-) The grave site of Ben Franklin is a must, don't forget to toss a coin on the grave for good luck and a tribute to Ben. His museum is absolutely terrific...one of the best. As you can tell, Philly and the park service deserve high marks for their work for making our visit great.