The “Wadden Sea Strategy on Education for Sustainable Development and World Heritage Interpretation” aims to provide a trans-boundary framework for environmental education and interpretation in the entire Wadden Sea World Heritage Site. It stands for ONE Wadden Sea and builds up on the local, regional and national strategies, concepts and individual activities – without replacing these – and provides an umbrella to promote the Wadden Sea’s OUV in an international and interdisciplinary approach. The strategy has been signed on the occasion of the 13th Trilateral Governmental Conference on the Protection of the Wadden Sea in Leeuwarden in May 2018.