The Atlantic Wall Open Air Museum (Dutch: Openluchtmuseum Atlantikwall) is a military museum near Oostende in Belgium which preserves fortifications of the Atlantic Wall dating to the First and Second World Wars. The section of fortifications owned by the museum - over 60 bunkers and two miles of trenches - is among the best preserved sections of the defensive line in Europe. The fortifications survive because they were built on land belonging to Prince Charles of Belgium who decided not to destroy them after liberation as a national monument.