OB 15cm Geschütz is a German World War II coastal artillery bunker located near the town of Dornumersiel in Lower Saxony, Germany. This type of bunker was designed to house a 15 cm caliber gun for coastal defense along the North Sea coast. The structure is part of Germany's extensive Atlantic Wall fortifications built during the war to defend against Allied invasion.
Today, the bunker stands as a historical relic of the region's military past, offering insights into the defensive strategies employed during World War II.