Stock Photo - Belgium, Ostend, 28.03.2013 The Atlantic Wall was a 2685 km long line of fortified positions along the coasts of the Atlantic, the Channel and the North Sea. They were planned during the Second World War by the German occupiers in France, Belgium, Netherlands, Denmark, Norway, the Channel Islands and the German Empire in the period 1942-1944 and partially built. The Atlantic Wall was to protect these areas from an Allied invasion. In the second world war the German occupiers built a naval coastal battery to protect the port city of Ostend as part of the Atlantic Wall, alias Salzwedel. Here beside the two gun bunkers and observation also emerged accommodation bunkers, anti-tank positions and numerous Flakkannonen. Photo: phones with warning signs in gun bunker - OSTENDE, Belgium, 28/03/2013