"Even with Segway tours rolling through and street performers loudly competing for audiences, the 15th-century Piazza Navona somehow retains a shred of grace and elegance in modern Rome. Calm Renaissance palazzi face the piazza’s centerpiece, the famous and complicated Bernini work, Fontana dei Quattro Fiumi (“Are these colossal male depictions of the four great rivers of the world writhing on top of a boulder not fancy enough? Let’s top it with an obelisk for a little visual interest.”). The piazza itself was created when a 1st-century arena was paved over to create a market square—you can still sense the oval track of the arena in the shape of the opening. Come for a gelato and some excellent people-watching, especially in the evening."