The 625SK mit OB Flak is a World War II German military bunker located in France, part of the extensive Atlantic Wall fortifications. This structure served as an observation bunker with an integrated anti-aircraft (Flak) position, designed to protect coastal defenses and coordinate artillery fire against Allied naval and air forces. Built by Nazi Germany during the occupation of France, it exemplifies the strategic military architecture of the period.
Today, it stands as a historical relic of the Atlantic Wall, attracting interest from military history enthusiasts and urban explorers.