+2 for the Simeone.
I haven't seen Al's 962 at Holbert's in some time.
Forget the cheesesteaks,
DiNic's roast pork sandwich with broccoli rabe and sharp provolone is where it's at.
From Philly take 95 up into NJ. You can cross the Delaware where Washington did - oops, being Canadian that may not hold much interest for you, sorry.

However, not far from there is an interesting piece of architecture - the Trenton Bath House, designed by Louis Kahn for the Trenton (NJ) Jewish Community Center. It's just off I-95 in Ewing, a suburb of Trenton.
Home - The Bath House