My discovery of the summer: Philadelphia is my favorite American city. Gritty, authentic, with real urban flair. Kind of what New York used to be. Plus the food is incredible. I spent six weeks there, during which time I was editing 100 Places in France, and I had the feeling I was in a French city. Two rivers, street life, packed cafés, I could have been in Lyon. Happily, I had the good luck to contribute this piece for Yahoo on some of the best parts of this great city.