My aunt was just in town for a visit, and we took the Architectural Foundation's river tour, which I'd never done before (though I'd certainly suggested it to a lot of people and seen the WTTW documentary version). I'd highly recommend it to people. The guide spoke nonstop for 90 minutes. The boat started at Michigan & Wacker, traveled to Chicago Ave. (on the north), south of Congress (on the south), then came back to Navy Pier before docking. I'd boated up and down the river in the past, so I was amazed at how much distance we covered and how much I learned. It was very impressive.