Gaze upon the city sights from the pinnacle of Chicago, the Skydeck. Located on the 103rd floor of Willis Tower, formerly Sears Tower -- the third-tallest building in the world -- the Skydeck offers spectacular sweeping views and is full of interactive exhibits. To complete your exciting Chicago experience, head to the Ledge, a glass balcony showcasing unbeatable views of Chicago's top attractions like Wrigley Field and the Navy Pier.