We’ve been coming to Chicago for years and years and have crossed the Michigan Ave bridge dozens of times each trip. Each time we’d say it was too cold or that we had other things to do. We finally took an architecture boat tour and it was well worth it. Our trip lasted 90 minutes and we got to go from the lock on the lake to the far end of the river. We had a great document for our tour who knew each building, the firm that did the design and lots of history. All in all, a great tour.