Get some pictures of the Philadelphia skyline: try from the South Street Bridge, after having a cheesesteak at Rick's, or from the Spring Garden Bridge where you can also see Boathouse Row.
No visit to Philly would be complete without spending some time in South Philly. Somewhat impossible to find a parking space though. It's worth it to taste for yourself who has the best cheesesteaks: Geno's or Pat's. I personally prefer Geno's; but you have to order correctly: one wiz with, please (or maybe 2 :-) I always visit the shops a little further up 9th St. Sarcone's will have your bread order ready for you if you order by 2 the day before; Isgro Pastries; Claudio Specialty will vacuum seal your meat selections; DeBruno will grate your fresh parmesan; and Hollywood Meat Market has the best meatballs!