10 That Changed

Waterborne diseases like cholera periodically devastated Chicago in the nineteenth century. The attempt to beat them inspired three of the most ambitious engineering feats the country has seen.

During Open House Chicago, which is October 14 and 15, you can see things you've never seen before as more than 200 sites across Chicago, Evanston, and Oak Park open to the public for free. So many choices are overwhelming, so we've chosen a few highlights.