(16 sided, Hilton Hotel, IL-16-18) in Oak Lawn, Cook County, IL. IL50 (Cicero Av.) N. 0.1 miles from jct with US12/20 in Oak Lawn, E. on 94th St. 250’ to the hotel on the N. side of the road. (11-14-04, N41° 43.329', W87° 44.386')