Ouvrage Four-à-Chaux

The fortification extends through 5 kilometers of underground galleries reaching depths of 30 meters beneath the hills overlooking the Sauer valley.

Built in 1930 as part of France's defensive strategy, the fort housed 24 officers and 600 soldiers during wartime operations until German forces captured it in 1940.

The museum displays military equipment, living quarters, and operational rooms that document the daily experiences of soldiers stationed at this eastern border fortress.

The site requires visitors to wear comfortable walking shoes and warm clothing as temperatures remain constant at 14 degrees Celsius throughout the underground passages.

An innovative inclined plane system connects the ammunition entrance to the personnel entrance, positioned 24 meters higher for strategic defensive purposes.

Location: Lembach

Inception: 1930

Part of: Fortified Sector of the Vosges

GPS coordinates: 48.99678,7.79773

Latest update: June 23, 2025 09:42