The Thyborøn fortress was built by the Germans during the occupation. The fortress was to prevent an Allied invasion. The Germans built more than 100 bunkers on a 5 km stretch of coastline around Thyborøn. The density of bunkers is the largest in the whole of the German Atlantic defence line. The line stretches from Northern Norway to the border between France and Spain. Many of the bunkers still exists today and are accesible in the area surrounding Kystcentret. Rent equipment at Kystcentret and spend the day exploring the area's bunkers. Turn on the torch and move into the darkness. Should you want to spend the night in a bunker, this can be done in Naturrum Thyborøn, which can be found in the immediate vicinity of Kystcentret. Rent Equipment on the coastal Centre and prepare your own food.