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Learn about the history, design, and features of the Willis Tower, formerly known as the Sears Tower, in Chicago. It is the third-tallest building in the Western Hemisphere and a popular tourist attraction.
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Experience the highest observation deck in the United States, with views of the city spanning up to four states. Enjoy The Ledge, a glass floor balcony, a new museum, and various tours and packages at Skydeck Chicago.
Visit the 103rd floor of Willis Tower, the third tallest building in the Western Hemisphere, and stand on The Ledge, a glass-floor observation box with stunning views of Chicago. Explore the interactive museum, trivia game, and simulated views of six of Chicago's attractions before you reach the top.
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What is the Willis Tower?
Learn how Willis Tower, formerly Sears Tower, became an iconic part of the Chicago skyline since 1973. Explore the tower's amenities, such as Skydeck, Catalog, broadcast antennae and more.