Cahokia Mounds State Historic Site (http://www.cahokiamounds.com), located in the Saint Louis Metro East region of Illinois, was home to the largest prehistoric city north of Mexico. The city was occupied for seven centuries as the American Indians here farmed, traded, created art, studied the sun, and built massive earthen mounds. Between 15,000 and 20,000 people lived at Cahokia when it reached its peak 800 years ago. Today, Cahokia is a UNESCO World Heritage Site. You can walk the grounds where the Indians walked, climb to the top of a 100 ft 30 m mound, and visit a world-class museum to learn more about life in this part of America before Columbus.
