St. Louis Downtown Airport Live Cam

Situated just minutes away from the Gateway Arch and downtown St. Louis


Cahokia is an archaeological site located in present-day Illinois, near the city of Collinsville. It was once the site of an ancient Native American city, which was the center of a pre-Columbian civilization known as the Mississippian culture. Cahokia flourished between the 9th and 15th centuries AD and was one of the largest urban settlements of its time in North America.

The Mississippian culture was characterized by the construction of large earthen mounds and a complex social, political, and religious organization. Cahokia was at the heart of this culture and served as a regional hub for trade, ceremonial activities, and political power. At its peak, the city is estimated to have had a population of between 10,000 and 20,000 people, making it one of the most populous cities in the world during its time.

The Cahokia site covers an area of approximately six square miles and contains more than 120 mounds. The largest and most prominent of these mounds is called Monks Mound, which stands over 100 feet tall and covers around 14 acres. Monks Mound was likely the central feature of the city and served as a ceremonial and administrative complex. It is named after the Trappist monks who lived nearby in the early 19th century.

The inhabitants of Cahokia were skilled farmers who cultivated maize (corn), beans, and squash. They also engaged in hunting, fishing, and gathering wild plants for subsistence. The city's agricultural surplus allowed for the growth of a complex society with specialized labor, including artisans, traders, and religious leaders.

Trade was an important aspect of Cahokia's society, with goods such as shells, copper, flint, pottery, and stone tools being exchanged over long distances. The city's location near the Mississippi River provided access to a vast trade network that stretched across the region.

Religion played a significant role in Cahokia's society, as evidenced by the presence of large ceremonial plazas and the remains of wooden structures that likely served as temples or gathering places. The people of Cahokia practiced a complex belief system and engaged in rituals that may have included human and animal sacrifices.

The decline of Cahokia began in the 13th century, and by the 15th century, the city was largely abandoned. The reasons for its decline are not entirely clear, but factors such as environmental degradation, social unrest, and changes in political and economic networks have been suggested.

Today, the Cahokia Mounds State Historic Site preserves the remnants of the ancient city. It has been designated a UNESCO World Heritage Site and is a popular destination for tourists and researchers interested in exploring the history and culture of the Mississippian people. The site offers a museum, interpretive center, and guided tours, providing visitors with insights into the fascinating civilization that once thrived in this area of Illinois.

Top Tourist Attractions

Cahokia Mounds State Historic Site, located near Collinsville, Illinois, is a significant tourist destination that offers several attractions for visitors. Here are some of the top tourist attractions at Cahokia:

  • Monks Mound: Monks Mound is the largest earthen mound at Cahokia and one of the most impressive archaeological features in North America. Visitors can climb to the top of the mound, which offers a panoramic view of the surrounding area.
  • Interpretive Center: The Interpretive Center at Cahokia Mounds provides visitors with a wealth of information about the Mississippian culture, the history of Cahokia, and the archaeological excavations conducted at the site. It features exhibits, artifacts, and interactive displays that help visitors understand the significance of Cahokia.
  • Woodhenge: Located just outside the Interpretive Center, Woodhenge is a reconstructed circular arrangement of posts that served as a solar calendar. It was used by the ancient inhabitants of Cahokia to mark the changing seasons and conduct astronomical observations.
  • Twin Mounds: Twin Mounds is a pair of large earthen mounds situated near Monks Mound. They are notable for their size and shape, and archaeologists believe they may have served as platforms for important structures or ceremonial purposes.
  • Cahokia's Stockade: Visitors can explore the reconstructed stockade, which was a wooden defensive wall surrounding a portion of the city. It provides insights into the defensive strategies employed by the people of Cahokia.
  • Rattlesnake Causeway: This raised roadway, known as the Rattlesnake Causeway, connected the main plaza of Cahokia to the nearby East St. Louis site. It is an important archaeological feature that demonstrates the engineering skills of the Mississippian culture.
  • Trails and Walking Paths: The Cahokia Mounds site offers several walking trails that allow visitors to explore the landscape and experience the natural beauty of the area. These trails provide access to various mounds, scenic overlooks, and archaeological sites.
  • Events and Festivals: Throughout the year, Cahokia Mounds hosts special events and festivals that celebrate the rich cultural heritage of the Mississippian people. These events often include demonstrations of ancient crafts, music, dance performances, and storytelling.

Visiting Cahokia Mounds State Historic Site offers a unique opportunity to step back in time and learn about the ancient civilization that once thrived in the region. It's a place where history, archaeology, and natural beauty converge, making it a must-visit destination for history enthusiasts and those interested in Native American cultures.


The climate at Cahokia is classified as a humid continental climate. Here's what you can expect in terms of weather and climate when visiting the site:

Seasons: Cahokia experiences four distinct seasons: spring, summer, autumn, and winter.
  • Spring (March to May): Spring in Cahokia is mild with temperatures gradually warming up. It can be a rainy season with occasional thunderstorms.
  • Summer (June to August): Summers in Cahokia are typically hot and humid. Average temperatures range from the 70s to 90s Fahrenheit (20s to 30s Celsius). July and August are usually the warmest months. Be prepared for high humidity levels during this time.
  • Autumn (September to November): Autumn in Cahokia brings cooler temperatures and colorful foliage. September and October are pleasant months with mild temperatures, making it a popular time for visitors.
  • Winter (December to February): Winters in Cahokia can be cold, with temperatures dropping below freezing. Average temperatures range from the 20s to 40s Fahrenheit (-6 to 4 degrees Celsius). Snowfall is common during this time, and it can occasionally disrupt travel plans.

Rainfall: Cahokia receives a moderate amount of rainfall throughout the year, with the highest precipitation occurring during the spring and summer months. It's a good idea to pack a rain jacket or umbrella, especially if visiting during the wetter seasons.

Dressing for the Climate: When visiting Cahokia Mounds State Historic Site, it's essential to dress appropriately for the weather conditions. In summer, lightweight and breathable clothing is recommended, along with sunscreen and a hat to protect against the sun. In winter, bundle up with warm layers, a coat, hat, gloves, and boots to stay comfortable in the cold temperatures.

It's always a good idea to check the local weather forecast before your visit to Cahokia Mounds State Historic Site to be prepared for any specific weather conditions during your stay.


Cahokia is situated in the southwestern part of Illinois, United States, near the modern-day city of Collinsville. Here are some details about the geography of Cahokia:

  • Location: Cahokia is located on a flat alluvial floodplain, which is part of the Mississippi River Valley. It lies on the eastern side of the Mississippi River, approximately 8 miles (13 kilometers) east of downtown St. Louis, Missouri.
  • Mississippi River: The site of Cahokia is situated near the banks of the Mississippi River. The river played a crucial role in the transportation, trade, and communication networks of the ancient Mississippian civilization. Its proximity to the river provided access to a vast regional trade network and facilitated the exchange of goods and ideas.
  • Floodplain: Cahokia is situated on a floodplain, which is a low-lying area adjacent to a river that is periodically flooded. The fertile floodplain soil was ideal for agriculture, allowing the inhabitants of Cahokia to engage in extensive farming activities to support their large population.
  • Topography: The immediate vicinity of Cahokia is relatively flat, with gentle slopes and no significant elevation changes. The land is characterized by alluvial deposits, which are sediments deposited by the Mississippi River over time.
  • Cahokia Mounds: The primary feature of the Cahokia site is the presence of numerous earthen mounds. These mounds were constructed by the ancient inhabitants of Cahokia and vary in size and shape. The largest and most well-known mound is Monks Mound, which rises over 100 feet (30 meters) and covers an area of about 14 acres (5.6 hectares). The mounds are an important part of the geographic landscape of Cahokia and played various roles in the social, religious, and ceremonial activities of the ancient civilization.
  • Woodlands: In the past, the area surrounding Cahokia was characterized by a mix of woodlands and open areas. The woodlands provided resources for hunting, gathering, and building materials. They also served as a habitat for various plants and wildlife that were important to the survival of the ancient inhabitants.

The geography of Cahokia, including its location near the Mississippi River and its flat floodplain, played a significant role in shaping the lives and activities of the ancient Mississippian people who inhabited the area. Today, the Cahokia Mounds State Historic Site preserves this unique geographical and archaeological heritage, allowing visitors to explore and learn about the ancient civilization that once thrived there.