Neither islands nor mainland: the unique Halligen islands are located in the Wadden Sea Biosphere Reserve.
Director:
Jul 6, 2023
Nov 10, 1929
Invalid Date
Aug 28, 2005
Nov 1, 2007
Apr 1, 2009
Apr 17, 2008
Apr 2, 1976
Oct 2, 1979
Feb 18, 1980
Aug 17, 2021
Oct 29, 2021
Jan 25, 2024
Oct 9, 2025
Sep 8, 2017
Jan 1, 2001
May 14, 1982
Feb 24, 2020
Mar 1, 2019