If you want to discuss the loaded topic of America's best pizza with any authority, you've got to make a pilgrimage to this legendary New Haven spot. What should you order at this checklist destination? Two words: clam pie. This is a Northeastern pizza genre unto its own, and Pepe's is the best of them all — freshly-shucked, briny littleneck clams, an intense dose of garlic, olive oil, oregano, and grated cheese atop a charcoal-colored crust. The advanced move? Clam pie with bacon (pictured). Just expect to wait in line if you get there after 11:30 a.m. on a weekend.