Watch America's National Treasures Season 1 Episode 5 Online

In the South are ruins of prehistoric cities, rivaling 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 traveling to the region's three national monuments devoted to prehistory. Chapter 1: Poverty Point National Monument (Louisiana) Chapter 2: Russell Cave National Monument (Alabama) Chapter 3: Ocmulgee National Monument (Georgia)