Park Tower

Park Tower, located at 800 North Michigan Avenue in Chicago, is a skyscraper that was completed in 2000. At 844 feet (257 m) tall with 70 floors — 67 floors for practical use, it is the eleventh tallest building in Chicago, the 35th tallest building in the United States, and the eighty-third tallest in the world by architectural detail. It is one of the world's tallest buildings to be clad with architectural precast concrete (the Transamerica Pyramid Building in San Francisco is taller). It is one of the tallest non-steel framed structures in the world—it is a cast-in-place concrete framed structure. This building was originally intended to be 650 feet (198 m) tall. But later, the ceiling heights were increased allowing it to reach 844 feet (257 m).