Sears Tower

The Sears Tower, now known as the Willis Tower, is a iconic skyscraper in Chicago and one of the tallest buildings in the United States. Completed in 1973, it stands about 1,450 feet tall with 110 floors. Its design features a distinctive bundled-tube structure, which provides stability and supports its height. The tower offers office spaces, observation decks with panoramic city views, and attracts millions of visitors yearly. As an architectural and engineering marvel, it symbolizes Chicago's skyline and innovation in tall-building construction.