5. Cahokia Mounds State Historic Site
The Cahokia Mounds State Historic Site is one of the best-known sites of the ancient Mississippian culture that peaked in the area around the year 1200. The park contains about 80 mounds that represent an early city. Anyone interested in early Native American settlements should visit Cahokia, one of the most renowned historic and sacred sites in the country. It is located in Illinois, across the Mississippi from St. Louis, Missouri.
