Neither islands nor mainland: the unique Halligen islands are located in the Wadden Sea Biosphere Reserve.
Director:
Nov 10, 1929
Jul 6, 2023
Invalid Date
Aug 28, 2005
Oct 29, 2021
Apr 1, 2009
Aug 17, 2021
Apr 2, 1976
Oct 2, 1979
Apr 17, 2008
Oct 9, 2025
Jan 25, 2024
Feb 18, 1980
Sep 8, 2017
Nov 1, 2007
Mar 25, 2014
Sep 4, 2018
Feb 27, 2022
Dec 1, 1997