The Glacier Mill, also known as Krai-Woog-Gumpen, is a waterfall and glacial mill in the Southern Black Forest, more precisely in the Schwarzenbächletal valley near Görwihl. It was probably formed by glacial erosion during the Ice Age and was only discovered and excavated in 1955. The name, of Alemannic origin, means "loudly rushing waterfall."
The glacier mill is the photo with the stone washed out by the water. Here, at the end of the ice age, the stone was filled in by melt water from the glacier, in which another stone was rotated within the balancing area by the incoming water and thus ground down the stone like a mill.