Siegfried Line Museum, Pirmasens

The Siegfried Line Museum at Pirmasens is a museum in the German state of Rhineland-Palatinate that is housed in a former subterranean fortification on the edge of the village of Niedersimten in southwest Palatinate. Its theme is war, but it also views itself as a memorial to peace. It was founded by the Gerstfeldhöhe Society and is run in cooperation with the town of Pirmasens.

Source: Wikipedia