KüVer 413 [FL 15] is a German World War II bunker located in the Netherlands. The designation 'KüVer' refers to a Küstenverteidigung (coastal defense) structure, part of the Atlantic Wall fortifications built by Nazi Germany along the European coast. This particular bunker was constructed as part of the extensive defensive network designed to prevent Allied invasion of occupied Europe.
The FL 15 designation indicates its specific function and design within the standardized Regelbau system used by German engineers.