L409A is a former German coastal battery position located near the village of Lønstrup in northern Denmark. The site is part of the extensive Atlantic Wall fortifications constructed by Nazi Germany during its occupation of Denmark in World War II. These coastal defenses were designed to control the North Sea coastline and protect against Allied amphibious assaults.
The specific designation 'L409A' follows the German military's standard naming convention for coastal artillery positions (often starting with 'L' for 'Lønstrup' or a local identifier). While the exact armament and construction details for this specific bunker are not provided in available sources, typical batteries in this region featured heavy artillery pieces, often 150mm or 155mm caliber, housed in reinforced concrete gun emplacements or open pit positions.
Today, the bunker exists as a relic of the 1940s occupation. Its current state is likely partially buried, overgrown, or repurposed, as is common with many Atlantic Wall structures. The site serves as a historical monument to the war in Denmark and is of interest to military historians and urban explorers studying the Atlantic Wall's northern sector. The rugged, windswept coastal geography of the area remains largely unchanged from the wartime period.