Skydeck Chicago at Willis Tower (Sears Tower)

Once the world’s tallest building, Willis Tower, formerly known as Sears Tower, now boasts the highest public viewing area in the United States. Located on the 103rd floor, Skydeck Chicago offers a sweeping panorama of the city, and on clear days, vistas extending to Indiana, Michigan, Iowa, and Wisconsin. Visitors can explore a museum that delves into the tower’s history and, for the adventurous, step onto The Ledge—an enclosed glass balcony that extends 4.3 feet (1.3 meters) from the tower, providing a thrilling, see-through view to the street below.