Cahokia Mounds State Historic Site
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30 Ramey Street, Collinsville
(618) 346-5160
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Cahokia Mounds State Historic Site is a UNESCO World Heritage Site and a significant archaeological landmark, home to around 120 mounds built by the Mississippians between 800-1400 A.D. The site, which covers over 56m², includes the largest pre-Columbian establishment in North America, reaching 30 meters high with 600,000 cubic meters of earth. Visitors can explore the area, which features information boards, and is accessible near the road and interstate highway. The museum and welcome center are currently closed. Regular visitors enjoy walking and working out on the mounds, especially in the early morning. While the site could benefit from more historical interpretation, it remains a unique and educational experience, providing a glimpse into the history of the first peoples in the region.