La Casa de las Sirenas has one of the city's best situated patios for sampling a tequila—or any of its other elixirs—with views of the Metropolitan Cathedral, National Palace, and Templo Mayor in the Zocalo. The menu has standard Mexican fare, plus some unusual entrées like duck tacos and pork medallions in mustard sauce. But it's the view and the ambience of the terrace that draw the crowds. Plus the tequila. The restaurant boasts more than 250 different brands, and an extensive wine list.