Duhnen is a seaside resort along the North Sea, 5 kilometres from the centre of Cuxhaven city, Lower Saxony, Germany. Duhnen is locateā¦Duhnen is a seaside resort along the North Sea, 5 kilometres from the centre of Cuxhaven city, Lower Saxony, Germany. Duhnen is located 351 kilometres northwest of Berlin. In 1935 Duhnen was incorporated into the city of Cuxhaven, more than 100 years after the city had been established. Visitors to Hamburg's nearby island of Neuwerk commonly travel through Duhnen. It was at one time a remote fishing and farming village, but today is one of the tourist centres of Cuxland.