There are natural lakes in Missouri...
Creve Coeur Lake near St. Louis is the largest natural lake in the state. The lake is an oxbow lake formed by the Missouri River when it abandoned an old channel and left the lake behind. There are other oxbow lakes along the Missouri and Mississippi Rivers in Missouri and there are some sinkhole lakes that are natural in Missouri.
Creve Coeur Lake near St. Louis is the largest natural lake in the state. The lake is an oxbow lake formed by the Missouri River when it abandoned an old channel and left the lake behind. There are other oxbow lakes along the Missouri and Mississippi Rivers in Missouri and there are some sinkhole lakes that are natural in Missouri.