The St. Louis region is situated right at the confluence of the Missouri and Mississippi rivers, which has been constantly changing over the centuries—just like the rest of the region.
Evans, James D.
"Where Rivers and Ideas Meet,"
The Confluence (2009-2020): Vol. 1
, Article 2.
Available at: https://digitalcommons.lindenwood.edu/confluence_2009/vol1/iss1/2