Good thing, too, because the Chicago River is not suitable for swimming. It is very suitable for canoeing, though! Annie and I went on a 3-hr, 7.5-mile jaunt through Chicago this past weekend, and ended up with tired arms, lots of self-congratulation, and no bacterial poisoning.
As it got darker, we entered a more industrial part of the city just south of downtown, the soundtrack to which was screeching freight trains, for longer than seemed possible. It was a little eery, but still lovely in its own way.