Mentioned by Chicago 4 days itinerary
Chicago 4 Day Itinerary: A Long Weekend in Chicago, Illinois, USA
"Probably the most iconic part of Navy Pier is the Centennial Wheel, a large ferris wheel. It’s open year round, weather permitting. Towards the end of the pier, you can also get a really good view of the city. It also holds several free events from time to time, so make sure to check the calendar before you go."