Le Grand Blockhaus

Le Grand Blockhaus is a military fortification spanning five levels across several hundred square meters, containing functional spaces such as radio stations, armories, machinery chambers, and observation posts. The structure is built within thick concrete walls that convey the original military purpose directly.

The blockhaus was built during World War II as part of German coastal defenses and served as an observation and command post. The Saint-Nazaire region remained under German control until May 1945, long after other French territories had been liberated.

The museum displays authentic wartime objects and equipment that together convey what daily life was like under German occupation. The exhibits and reconstructed spaces help visitors understand how people lived and worked during this period.

Access is through an ordinary door at ground level, and stairs lead up and down through all five floors. Visitors should bring sturdy shoes and a flashlight, as some areas have limited light and pathways are narrow.

From the top level, visitors can observe the coastline through the same viewing openings that were used during the war for surveillance purposes. This perspective reveals how guards once monitored the shoreline and watched for possible threats.

Location: Batz-sur-Mer

Fee: Yes

Address: 12 Rte du Dervin, 44740 Batz-sur-Mer, France

Opening Hours: Monday-Sunday 10:00-19:00

Phone: +33240238829

Website: https://grand-blockhaus.com

GPS coordinates: 47.27055,-2.46915

Latest update: December 12, 2025 07:53