Get a panoramic view of Chicago from the Chicago Skydeck, located atop one of the tallest buildings in the world.The Ledge Experience brings an exhilarating new experience to the Skydeck. At 1,353 feet up, The Ledge's glass boxes extend out 4.3 feet from the skyscraper's Skydeck on the 103rd floor, providing never-before-seen views of the city. Formerly known as the Sears Tower.