(Illinois)
Fults Hill Prairie State Natural Area, also known as the Fults Hill Prairie Nature Preserve, is a state park and nature reserve on 997 acres (403 ha) in Monroe County, Illinois, United States. A key feature of the preserve is a 532-acre (215 ha) hill prairie located on the east bluff of the Mississippi River overlooking the American Bottom near Fults, Illinois. The Fults Hill Prairie has been listed as a National Natural Landmark. (Ref: https://en.wikipedia.org/wiki/Fults_Hill_Prairie_State_Natural_Area)