Also called the "Blue Eye" of the Hegau. Unlike other volcanic relics and maars in the Swabian Alb, the "Höwenegg" is part of the Hegau volcanism. The main crater is …
The deep, quite narrow valley is crossed by a small stream, which is partially completely dried up. It was not formed by the stream, but by glaciers during the ice age. Striking rocks and great rock formations line the path.