Winkel 43
This popular café offers a rotating menu for breakfast, lunch, and dinner but the crowds show up for their famous appeltaart. Locals, students, and tourists in the know gather here for slices of the thick, cakelike Dutch specialty that's studded with fresh apples and cinnamon. Do it the Dutch way and order a slice with homemade whipped cream accompanied by fresh mint tea or coffee. The best place to eat is on Winkel's large patio—but Monday and Saturday can get crazy before 5 pm, when crowds spill over from the adjacent Noordermarkt.