Mentioned by Chicago 3 days itinerary
Chicago Itinerary – 3 Days in Chicago for First Timers
"A few of the highlights of your tour include the Museum Campus, Navy Pier, Water Tower Place Mall, Willis Tower (formerly Sears Tower), and more. You’ll be able to disembark at most landmarks, so it’s easy to use this your to further your itinerary (although traffic can be a factor, so don’t rely exclusively on this for transportation)."