Café de Tacuba
An essential, if touristy, breakfast, lunch, dinner, or snack stop downtown, this Mexican classic opened in 1912 in a section of an old convent. At the entrance to the main dining room are huge 18th-century oil paintings depicting the invention of mole poblano, a complex sauce featuring a variety of chiles and chocolate that was created by the nuns in the Santa Rosa Convent in Puebla. A student group dressed in medieval capes and hats usually serenades diners Wednesday through Sunday afternoons.