Romans flock to Pierluigi for the city's freshest seafood—all of the fish here is Italian (with the exception of the oysters and lobsters). Get a table outside on the Piazza de' Ricci and order the octopus carpaccio. It's the most thinly sliced, perfectly prepped octopus you'll ever have. The outstanding people-watching only adds to the experience, not to mention the 600 vinos you can conjure from the restaurant's wine cellar. Reservations recommended.