The Chicago Architecture Center (CAC), formerly the Chicago Architecture Foundation, is a nonprofit cultural organization with tours, exhibitions, programs and events for all ages. Visit the CAC on Wacker Dr. to view our 4,000-building scale model of Chicago, shop in our award-winning store or participate in a fun LEGO® building event in our ArcelorMittal Design Studio. Choose from 85 tours by boat, walking, bus, or even L train, including the CAFC River Cruise aboard Chicago's First Lady Cruises. Tours depart daily and are led by CAC's expert docent guides. Every October, check out CAC's free annual Open House Chicago festival. Proceeds from CAC’s tours and gift shop, as well as grants, sponsorships and donations, support this educational mission.