sentences:  It uses much of the adjoining land for a 4-H camp, with cottages and other buildings, and day and residential environmental education.What prompted the early inhabitants of Middle Georgia, who lived in a time long before the rise of the later Mississippian, Creek and Cherokee cultures, to build these massive effigy mounds is still something of a mystery.They obviously hold ceremonial significance and the Rock Eagle seems to have been expanded from a large dome-shaped central mound.