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In addition to the restaurants around the zócalo, you'll want to head to Boca del Río. Many restaurants here are modest, but serve some of the finest seafood in this part of the country. If you'd like to eat with the locals, try the Mercado Hidalgo for breakfast or lunch; it's a 10-block walk south from the zócalo. Seafood lovers can get a quick fix at the fish market, a mint-green building at the corner of Avenida Aquiles Serdán and Avenida Landero y Coss.
For a hearty meal after a day at the aquarium, pop around the corner to this casual yet elegant Argentine restaurant. Select your cut of rib eye, tenderloin, or strip steak from the selection that's brought to your table, and tell your bow-tied waiter how you'd like it cooked. While it sizzles, nibble one of the flaky empanadas topped with chimichurri (sauce made with olive oil and parsley). Try the house cocktail, Rosita (made with anise).
