A military bunker located near Saint-Rémy-de-Provence, France, housing a preserved 10,5 cm field gun emplacement. The structure is part of France’s interwar and WWII-era coastal and regional defense network, constructed during the late 1930s as part of efforts to fortify southern approaches against potential Axis incursions. The designation 'OB' likely refers to 'Obergeschütz' (German for 'upper gun'), suggesting possible German influence or reuse during the occupation period, though the gun itself is a French-designed 10.5 cm field piece commonly used by French and later German forces after 1940.
The bunker features reinforced concrete walls and an open firing position oriented toward the surrounding plains, typical of fixed artillery emplacements designed for indirect fire support. Its location in the Bouches-du-Rhône region places it within a historically contested corridor linking the Rhône Valley to the Mediterranean coast, an area fortified by both French and German forces during WWII. The emplacement lacks modern modifications and shows signs of weathering, consistent with decades of abandonment.
Today, the site is accessible to urban explorers and military history enthusiasts, often included in regional WWII fortifications tours. While no official documentation confirms its exact construction date or original crew size, the presence of the 10.5 cm gun and the bunker’s structural design align with standard French and German field artillery positions from the early 1940s. It is not linked to France’s later nuclear weapons program, which began in the 1950s and focused on submarine and air-delivered systems far from this location.
This site is a tangible remnant of Cold War-era military heritage only in the sense that it predates and contrasts with later nuclear deterrence infrastructure. It remains a well-preserved example of conventional artillery defense in southern France, valued by urbex communities and historians studying European fortifications.