The best address for GPS is 131 S Dearborn. This is the Citadel Garage, operated by LAZ. The facility entrance is located in the alley (Marble Place) on the east side of Dearborn, between Adams St. and Monroe. While heading northbound on Dearborn St., after crossing Adams St., turn right into the alley, just past the Monroe CTA Blue Line entrance. After turning into the alley, the garage entrance is on the right with a black and white “Self Park” sign above the entrance.