Before you set out, call Park House Information to find out which historic houses are open that day. Another option is to take the narrated tour given by Philadelphia Trolley Works (board it at the Philadelphia Museum of Art or at John F. Kennedy Plaza, at 16th Street and John F. Kennedy Boulevard). The trolley bus visits many of these sites, and you can get on and off all day for $25.
Visit the Travel Talk forums for help on planning your trip