Willis Tower (formerly Sears Tower)

Willis Tower, formerly known as the Sears Tower, is a prominent skyscraper located in Chicago, Illinois. Completed in 1973, it stands 1,450 feet tall, making it one of the tallest buildings in the United States. The tower features a distinctive black exterior and has 110 stories. For many years, it was the tallest building in the world. Visitors can go to its Skydeck on the 103rd floor for stunning views of the city. The building was renamed in 2009 when Willis Group Holdings acquired the naming rights. It remains an iconic symbol of Chicago's skyline.