Take the ear-popping ride to the 103rd floor of the Willis Tower (né the Sears Tower) to get to Skydeck Chicago, where on a clear day you can see as far as Michigan, Wisconsin, and Indiana. Read more.
During the ride, a knowledgeable volunteer guide will give you the details on more than 50 buildings along the river, and explain how Chicago grew into the important metropolis it is today. Read more.