Update: See more of the bridge and river from September of 2023.
Much to my surprise, the Michigan Avenue Bridge over the Chicago River has a museum in it now, well at least in the control tower on the southwest corner.
Inside, you can see the gears that hoist the bridge open and closed.
Well, at least once you turn the flash off so the light doesn’t bounce off the chicken wire.
The best thing about the tour is being able to take snapshots out the windows up and down the river, and Michigan Avenue. For $3, it’s a great deal to learn about the history of Chicago’s rivers.