Chicago Architecture Center

The Chicago Architecture Center (CAC), formerly the Chicago Architecture Foundation, is a nonprofit cultural organization based in Chicago, Illinois, United States, whose mission is to showcase Chicago and ideas from cities worldwide to inspire better living through design. Founded in 1966, its programs include public tours and programs, most notably the docent-led architecture cruise on the Chicago River, and other tours in the Chicago area.

Source: Wikipedia — Chicago Architecture Center (CC BY-SA 4.0)