Sears Tower and 311 South Wacker Drive

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 second tallest reinforced concrete building in the world (after Two Prudential Plaza, also in Chicago).^{[citation needed]}The building is also the tallest building in the world known 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.^{[citation needed]}