Idyll

Just a kettle hole, but they are of course always mysterious.
The bottom feaures of the geological interpretive trail at the Tettnang edge of the first XXL edition of lake constance are very much the same as those ice age lake outlines in the Great Lakes region, just the plants and bugs are a bit different. I love this place as it reminds me most of Stoney Creek Metropark, it even got it's own little ancient inland dune. :o)

I had to search the term "kettle hole", as I never heard it before. Very interesting.