The Blockhaus d'Éperlecques is a massive concrete bunker located in northern France, near Watten. Built by Nazi Germany during World War II as part of the Atlantic Wall fortifications, it was intended to serve as a launch site for V-2 rockets targeting England. The structure, also known as the Watten bunker, was heavily bombed by Allied forces in 1943 and 1944 before it could be completed, leaving it in its current ruined state.
Today, it stands as a historical monument and museum, offering visitors insight into the military engineering and strategic importance of the site during the war.