Collinsville
Collinsville,
city (1990 pop. 22,446), Madison co., SW Ill.; settled 1817, inc. 1872. Once a coal-mining center, the city now has food-products and clothing industries. Nearby are the Cahokia MoundsCahokia Mounds,approximately 85 surviving Native American earthworks, most in Cahokia Mounds State Historic Site, SW Ill., near East St. Louis; largest group of mounds N of Mexico. Monks' Mound, a rectangular, flat-topped earthwork, 100 ft (30.
..... Click the link for more information. , the Native American earthworks.