- www.columbiaillinois.com
- Located Near Cahokia Mounds, the Powell Archaeological Research Center (PARC) is dedicated to saving archaeological data for future study. It has been formed by individuals concerned about the destruction of archaeological sites by ongoing development in the St. Louis area.www.powellarchaeology.org
- Real estate and homes for sale in Columbia, Waterloo, Belleville, Fairview Heights, O'Fallon, and St. Louis.www.davidwittenauer.com