The bunker located at these coordinates is part of the historic U-boat base at Keroman in Lorient, France. Specifically, it is the Keroman 3 (K3) bunker, a massive reinforced concrete structure built by Nazi Germany during World War II to protect U-boats from Allied air raids. Lorient was a critical Atlantic naval base for the German Kriegsmarine, and the Keroman bunkers were engineering marvels of their time, featuring thick roofs and walls designed to withstand heavy bombardment.
After the war, the French Navy continued to use the K3 bunker for several decades until the 1990s. Today, the site has been repurposed as a historical monument and museum, open to the public. It stands as a stark reminder of the Battle of the Atlantic and the strategic importance of the French Atlantic coast during the conflict. Visitors can explore the vast interior spaces and learn about the technology and history of the U-boat war.
The structure exemplifies German wartime fortification architecture (Regelbau) and is a key component of Lorient's military heritage tourism. Its preservation allows for an authentic encounter with WWII coastal defense infrastructure. The site is integrated into the urban landscape of Lorient, serving both as a memorial and an educational resource about this dark chapter of maritime military history.