Use these 4 passes to go to the top of the tallest building in North America!

With interactive touch screen activities, breathtaking Ledge views from atop six Chicago landmarks, a cool documentary on the history of the tower and highlights of the city's biggest attractions, there's something new for everyone.  Dare to step out and stand 1,353 feet above the busy city streets below with only 1.5 inches of crystal-clear glass at your feet!