Exploring Cahokia Mounds: America’s Largest Ancient City
Long before European settlers arrived in North America, Cahokia was a thriving civilization, home to a complex society of Mississippian people. Today, Cahokia Mounds State Historic Site, located in Collinsville, Illinois, offers a glimpse into the past as America’s largest pre-Columbian city and a UNESCO World Heritage Site.
1. The History of Cahokia Mounds
Cahokia was once the largest and most sophisticated Native American city north of Mexico, flourishing between 1050 and 1350 AD. At its peak, it covered six square miles and had an estimated population of over 20,000 people.
Why is Cahokia Important?
- It was a major trading and cultural hub.
- Home to more than 120 earthen mounds, built for ceremonial, residential, and burial purposes.
- Featured an advanced agricultural system and astronomical observatories.
2. Must-See Attractions at Cahokia Mounds
Monks Mound – The Largest Earthen Structure in North America
- Height: 100 feet tall
- Base: Covers over 14 acres
- Climb to the top for breathtaking views of the surrounding landscape, including the St. Louis skyline.
Woodhenge – Cahokia’s Ancient Solar Calendar
- A series of wooden posts arranged in a circular pattern.
- Used to track the seasons and align with the solstices.
- Best time to visit: During the Spring and Fall Equinox sunrise events.
Grand Plaza – The Center of Cahokian Life
- Once used for ceremonial gatherings, markets, and sporting events.
- Evidence of large communal structures and public feasts.
The Interpretive Center Museum
- Features artifacts, interactive displays, and a theater.
- Learn about daily life, trade networks, and Cahokian culture.
For more historic sites in Illinois, check out our Abraham Lincoln Library & Museum Guide.
3. Best Time to Visit Cahokia Mounds
Cahokia Mounds is open year-round, but the best seasons to visit are:
- Spring (March–May): Comfortable temperatures and blooming wildflowers.
- Fall (September–November): Beautiful autumn foliage and cooler weather.
- Summer (June–August): Great for outdoor exploring, but bring sunscreen!
4. Things to Do Near Cahokia Mounds
If you're in the area, consider visiting these nearby attractions:
- Gateway Arch National Park (NPS Link) – Just 15 minutes away in St. Louis.
- The National Great Rivers Museum – Learn about the Mississippi River’s impact on the region.
- Horseshoe Lake State Park – A scenic spot for hiking, birdwatching, and fishing.
For more unique travel destinations, explore our Route 66 Illinois Road Trip Guide.
5. Visitor Tips for Cahokia Mounds
- Admission is free, but donations are encouraged to help with preservation efforts.
- Bring comfortable walking shoes, as the site covers several miles.
- Visit early in the day to avoid the afternoon heat during summer months.
- Check the official website for special events, guided tours, and seasonal programs.
Final Thoughts
Cahokia Mounds is one of the most fascinating and historically significant sites in the United States. Whether you're climbing Monks Mound, exploring ancient structures, or learning about Mississippian culture, this destination offers an unforgettable experience.
Plan your visit today and take a step back in time to discover the largest ancient city in North America!
For more incredible Illinois destinations, check out our Starved Rock State Park Guide and Ultimate Illinois Travel Guide.
