Neither islands nor mainland: the unique Halligen islands are located in the Wadden Sea Biosphere Reserve.
Director:
Invalid Date
Nov 10, 1929
Jul 6, 2023
Apr 17, 2008
Jan 25, 2024
Nov 1, 2007
Aug 28, 2005
Oct 2, 1979
Aug 17, 2021
Apr 2, 1976
Oct 9, 2025
Apr 1, 2009
Feb 18, 1980
Oct 29, 2021
Sep 8, 2017
Jun 14, 2021
May 30, 2021
Aug 1, 2005
May 31, 2021