A fine day in Chicago

Just had a day in Chicago, checking out the architecture and the views from the Hancock Center and Sears Tower. The Hancock Center is the pick of the views, as it is closer to Lake Michigan and gives a better overall picture, as well as highlighting just how high the Sears Tower is on the other end of the CBD.
I must say - Chicago is ridiculously flat. I think I'd go mad here without any hills to give a truer sense of elevation (apart from that provided by tall buildings).
Off to Ottawa tomorrow.