Neuwerk (3 km², 39 inhabitants) is a tidal island in the Wadden Sea on the German North Sea coast. Neuwerk is located 13 km northwest of Cuxhaven, between the Weser and Elbe estuaries. The distance to Hamburg's center is about 120 km. Other English names for the island are New-Werk and Newark.
Administratively, Neuwerk forms a homonymous quarter of the city of Hamburg, Germany, which is part of the borough Hamburg-Mitte. This quarter includes the islands of Scharhörn and Nigehörn, which are bird sanctuaries and closed to the public. All three islands and the Wadden Sea around them form the Hamburg Wadden Sea National Park. (from wikipedia : https://en.wikipedia.org/wiki/Neuwerk)
google image :
Tour site :
http://www.hamburg-travel.com/attractions/green-hamburg/parks-green-spaces/neuwerk-island/
Hamburg Wadden Sea National Park
The Hamburg Wadden Sea National Park (German: Hamburgisches Wattenmeer) is the smallest of the three German Wadden Sea National Parks which protect the single ecological entity of the Wadden Sea (UNESCO biosphere reserve) reaching from Den Helder to Esbjerg.
It is an exclave of the city state of Hamburg in North Germany and lies 12.5 km off Cuxhaven in the estuary of the Elbe in the North Sea (German Bight) and includes the islands of Neuwerk, Scharhörn and Nigehörn. It is made up mainly of sand and mixed mudflats with shallow creeks, sand bars (Plaaten) and the aforementioned dune islands. (From wikipedia : https://en.wikipedia.org/wiki/Hamburg_Wadden_Sea_National_Park)