There’s something for everyone at willis tower. It is 110 stories high, and its the tallest building in the western hemisphere. Willis tower is world famous for its architecture and height of 1,451 feet. This architectural icon offers spectacular views of the city and four states at the skydeck observation center on the 103rd floor. From grab-and-go dining options, to the thrilling views of the skydeck, lush public greenspaces and everything in between.