Description311 South Wacker Drive, Chicago, Illinois (9179394139).jpg
311 South Wacker Drive in Chicago, USA, is a post-modern 65-story skyscraper completed in 1990. At 961 feet (293 m) tall, it is the seventh tallest building in Chicago and the 16th tallest in the United States. It was once the tallest reinforced concrete building in the world. The building is also the tallest building in the world known only by its street address.
The lower level of the winter garden was designed to connect via underground passageway to Union Station. The building also contains three levels of underground parking. The building contains both retail and commercial tenants.
The top of the building is a 105-foot (32 m)-tall translucent cylinder, surrounded by four other smaller cylinders, which was inspired by the massing of the Tribune Tower. This makes it among the most visible Chicago skyscrapers at night, as its crown is brightly illuminated. The five cylinders on top are lit at night by 1,852 fluorescent tubes, and a lantern at the top changes colors for various holidays and special events.
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