Bunker BN3 Grensstelling Lanaken is a World War II defensive fortification located near Lanaken in the province of Limburg, Belgium. It forms part of the Grensstelling Lanaken, a border defense line constructed during the war to protect against potential invasion. The bunker is situated in a strategic location near the Belgian-Dutch border, reflecting the military importance of the region during the conflict.
Its construction and design are typical of the defensive structures built in Belgium during the German occupation period.