Düne
Düne (Danish: "Dynen", North Frisian: "de Halem") is one of two islands in the German Bight that form the Archipelago of Heligoland, the other being Heligoland proper. Geography. The small island of Düne is part of the German State of Schleswig-Holstein. Situated to the east of the main island Heligoland, Düne is part of the "" protected natural area. The island measures in length and in width. The island is separated from Heligoland proper by the Rede strait. History. Until the 17th century, Düne was connected to Heligoland. On New Year's Eve 1721 a big storm surge separated  the dunes from Heligoland. Therefore, the island that arose was called Düne "(English: Dune)". In 1935 the size of the island was . In 1940 the National Socialist government increased the size of the island to . This increase was for use as a military airfield. The Heligoland Airport is still used today and has three runways, of which the longest is .