Mentioning “Testaccio” and “pizza” in the same sentence elicits one typical response from locals: Da Remo, a Roman institution. In the summer especially, come early or be prepared to wait for a table. Every crisp-crusted, perfectly foldable pizza is made for all to see behind open counters. The most basic ones (margherita and marinara) start at around 7€. If it’s too crowded on a summer evening, order your pizza for takeout and eat it in the park across the street.