This is Mexico City's version of the Empire State Building. It took eight years to complete; construction began in 1948 and ended in 1956. It has 44 floors and a TV-radio tower, and weighs 25,000 tons; its mass is held up by 361 concrete pylons. You can get a great view of the city from the skyscraper's observation decks, restaurant, and cafés on floors 37, 42, 43, and 44. Stop off at floor 38 to visit a museum on the history of the tower and the city (included in admission). A second Bicentennial Museum on the 36th floor has documents from the early independence era and carries an extra MX$20 admission fee.