The Bunker Museum Hirtshals is Denmark's only excavated, complete German defence installation from World War II open to the public. The museum consists of 54 excavated bunkers along with many gun, mortar and machinegun emplacements. There are also radar and searchlight installations. In all the area contains 70 different rooms connected by 3.5 km of trenches. Most of the bunkers belong to the so called 10.Battery, but the Harbour Master's installation is also a part of the museum area.