Piazza Navona

Rome's most beautiful piazza sits on the outline of a first-century Roman stadium, and you can still see the oval shape. Bernini's Fountain of the Four Rivers anchors the center, flanked by two smaller fountains. The piazza is ringed by Baroque facades and outdoor cafes that charge double for the privilege of sitting there (a coffee costs €6 versus €1.20 at the bar around the corner). Best visited as a walk-through, not a sit-down. Street artists and occasional small markets keep it lively year-round.