(Cahokia) in Cahokia, St. Clair County, IL. IL157 (Camp Jackson Rd.) NW 0.35 miles from jct with I255 exit 13, NE (right) on Paris Av. 0.5 miles, NW (left) on Mullens Av. 1 block to the tower on the NE side of the road. (9-7-09, N38 33.655 W90 09.629) Photo by Jack & June Schmidt.