11 Via Veneto
Tuna is Rome's anti-osteria. Right off the Via Veneto, this sleek spot with windows framing an ice-filled steel basin of fresh fish has a minimalist seafood-heavy menu. Grilled scampi, harvested off the island of Ponza, is a local delicacy, while creamy spaghetti alle vongole is punctuated by sweet clams. Indecisive? Share the crudo di pesce e crostacei, a flurry of small cold appetizers, and the misto tuna, a cascade of hot dishes (including sautéed mussels, fried calamari, and whatever other treats they decide to throw in). Skip the forgettable desserts in favor of an extra glass from the lively wine list.
Tip: Come for a light lunch before touring the nearby Piazza Barberini (entrées, $20$45).