A military bunker located near Siracourt, France, in the Pas-de-Calais department. This region was heavily fortified by Nazi Germany during World War II as part of the Atlantic Wall defensive system. The area saw significant military construction, including V-1 missile launch facilities and U-boat pens along the French coast.
While specific details about this particular bunker are not confirmed in the search results, it likely dates to the 1940s wartime period when the area was under German occupation.