ROME, ITALY

Rome is one of those cities you could spend a year in and still feel like you've barely scratched its surface. Amazing historical sites, mind-blowing art—and then there's the food. Stop at the Forno in the Campo de' Fiori for a fresh slice of pizza bianca (cut from a piping hot six-foot-long slab of it), buy some tiny strawberries in a street market, and make it your business to find the city's best gelato. Someone has to do it.