St. Clair County, Illinois
Cahokia Mounds (Burial site)
[Map] 7850 Collinsville Rd., Cahokia Mounds State Park, Collinsville, IllinoisAlso known as: Monks Mounds
Old Cahokia Courthouse (Courthouse)
[Map] Corner of W. 1st and Elm Sts., Cahokia, IllinoisAlso known as: Saucier,Francois,House
Scott Field Historic District (District)
[Map] Roughly bounded by Scott Dr. and Hanger Rd., O'Fallon, IllinoisAlso known as: Scott Air Force Base Historic District