United States of America
Siegenthaler-Kaestner Esker is a 37-acre (150,000 m2) state nature preserve located in Champaign County, Ohio, United States. It contains an esker, kame, and kettle, all glacial landforms. It is an example of a sinuous esker, an ancient ice-walled stream channel which flowed through a Wisconsinan gl
acier 11,000-25,000 years ago.
Listen to the audio guide for Siegenthaler-Kaestner Esker State Nature Preserve Free on WIP — starts by itself when you arrive, even with the screen off