Moundville
In AD 1300, Moundville was the largest community north of Mexico. Possibly as many as 10,000 people paid tribute to the mound builders. There were 29 mounds constructed over 185 acres near the Black Warrior River Valley. The Black Warrior River and the Cahaba River run parallel to each other for over 100 miles, often as close 30 miles apart or even closer. Just South of Centerville, a mound remains, showing how widespread and dominant the rule of the mound builders was.
Read more about this topic: Cahaba River