Höwenegg

Welcome to Höwenegg

The Höwenegg belongs to the Hegau volcanoes. The surface lake is not a crater lake but was formed by basalt mining.

About 7 to 12 million years ago, Hegau was a region with strong volcanism. The Wartenberg near Geisingen and the Höwenegg near Immendingen are also part of the Hegau volcanoes. They are the northernmost of the Hegau volcanoes.

The volcanic basalt rock was quarried on Höwenegg from 1900 to 1979 (for paving stones, floor slabs and road construction)

Geothermal energy also plays a central role for the TuWass thermal and leisure pool in Tuttlingen. During targeted drilling in 1998, the (hoped-for) mineral thermal water was discovered at a depth of around 642 meters.

At around 48° Celsius, the temperature was significantly higher than would have been expected. Experts suspect a connection with the Hegau volcanism.