Hagermarsch (Q634224)

Lower Saxon Wadden Sea National Park (Q661217) — German national park in Lower Saxony wikidata match

Wadden Sea and Hallig Islands of Schleswig-Holstein Biosphere Reserve (Q864760) — Biosphere reserve in Germany | designated in 1990 (Waddensea of Schleswig-Holstein extended and renamed in 2004) wikidata match