It may be called the Willis Tower now, but it's still the tallest building in North America, and the Skydeck is still the Skydeck. With these passes you and three brave friends will enjoy spectacular views of the city, as well as a glimpse of four surrounding states. And if you're really feeling bold, step four feet outside the Tower with just glass beneath your feet. Yikes! For those who prefer metal and concrete under their toes, the Skydeck also features (inside) a variety of exhibits highlighting the history of Chicago.