I love to wander around Reading Terminal Market when I come to Philadelphia. The downside is there is a lot of meat there. I mean a lot. I guess that is because the locavore scene is largely about meat these days. But there are some good local produce stands as well, a vegetarian place to eat, a little spice store, a book store, some bakeries, etc. It's a funky place where you can get some local produce (I got some white cherries and peaches) and you can people watch to your heart's content.