Goldbacher Stollen
The Goldbacher Stollen was constructed between June 1944 and April 1945 by inmates of the Überlingen-Aufkirch concentration camp of the Dachau concentration camp under forced labor conditions. It was built into the Molasse rock formation between Goldbach and Überlingen on the northern shore of the Lake Überlingen (part of Lake Constance). The facility was intended to serve as an underground relocation site for war-critical armaments industries from Friedrichshafen, located about 35 kilometers southeast.