OB 10,5cm Geschütz is a German World War II coastal artillery bunker located in Brittany, France. Built as part of the Atlantic Wall defenses, this reinforced concrete structure housed a 10.5 cm naval gun designed to defend the French coastline against Allied naval forces. The bunker exemplifies the Regelbau standardization used by German forces during the occupation of France, featuring thick walls and a protected gun emplacement. Situated along the strategic Atlantic coast, it formed part of the extensive network of fortifications constructed between 1940 and 1944 to prevent Allied invasion.
Today, the OB 10,5cm Geschütz stands as a historical relic of the Second World War, attracting military history enthusiasts and urbex explorers interested in the Atlantic Wall fortifications. The structure remains in a preserved state, offering insight into the engineering and defensive strategies employed by German forces during their occupation of France. Its location near the coast provides a stark reminder of the wartime tensions that once defined this region of Brittany.