For the development of the museum and the opening of the corridors in the dunes, a lot of work has already been done in recent years. From 2013, the northern part of the corridors has been tackled. The work consists of excavating the corridors filled with sand and debris and all that is needed to open these corridors to the public. The fire control post, which has been made accessible earlier, is increasingly being brought back to its original state. The work is carried out by volunteers and has taken up some 45,000 hours from the start. Thanks to the work of the volunteers, it is becoming increasingly possible to give visitors an impression of what was built by the Germans during the war years.