If you find yourself in Philadelphia and you're hungry find your way to the Reading Terminal Market. It's a 10 minute walk from Independence Hall. This fantastic place is a true marketplace, farmers market, gourmet and local foods. I have a couple of recommendations.
Olympic Gyros has very nice gyros. The owner really was concerned that we like the food. That's a nice touch. Another place is Carmen's Cheesesteak. The sandwiches are huge and tasty. More importantly, if you feel like you haven't visited Philadelphia without having a cheesesteak but you're vegan, never fear. Their vegan cheesesteak
Tasted totally authentic. I highly recommend Carmen's.