Los Cuatro Soles is an easygoing, plant-filled space, perfect for sharing tacos and agua frescas with a friend. The South Philly spot is bright, energetic, and serves juicy shrimp tacos that are punched up with a piquin pepper chipotle mayo sauce, enchiladas drenched in earthy mole sauce, and puffy quesadillas fritas filled with chorizo, ham, sausage, avocado, and chipotle or jalapeño peppers.