In the South are ruins of prehistoric cities, rivalling any in the ancient world. They were built by Native American cultures living in the South. It is a largely unknown story ... A story you can learn by travelling to the region's three national monuments devoted to pre-history. Monuments on this Program: Poverty Point National Monument -Tells the story of America's oldest city (Louisiana) Russell Cave National Monument - The longest continually occupied cave in North America (Alabama) Ocmulgee National Monument - One of the great City-States of the Mississippian Culture (Georgia)