The Torre Latinoamericana was Latin America’s tallest building when constructed in 1956 and thanks to the deep-seated pylons that anchor the building, it has withstood several major earthquakes. Views from the 44th-floor observation deck and the 41st-floor lounge bar are spectacular, smog permitting. Admission includes access to an on-site museum that chronicles Mexico City's history.
Admission is free if you're just visiting the bar.