Step outside the tallest building in the western hemisphere and the third tallest in the world. At 1,353 feet in the air, the Ledge’s glass boxes extend out 4.3 feet from Skydeck. The Skydeck is open daily offering spectacular views spanning up to four states, a one-stop Chicago experience full of interactive exhibits and…The Ledge, a glass balcony experience extending four feet outside the 103rd floor of Willis Tower!