Boulangerie Saint-Louis, Paris
Paris has much to recommend it, not least the fact that whenever you are feeling a bit peckish, no matter where you are, there will be a half-decent boulangerie within spitting distance. Just pop in, pick up a croissant (and maybe a few other treats), and munch your way happily down the street. This croissant, for example, was just the kick I needed after a few hours stomping across Paris. It wasn't very buttery, but it was very good. I love the way the light, fluffy layers of pastry squish together as you take each bite.