De Muy is a young dune area north of De Koog. With a small dike that separates the area from the salty Sluftervallei, it was possible to drain a piece of beach. Because new drifting dikes were constructed on the beach later, the groundwater rose and the Muyplas was created..© 30 juni 2018 Marco van Middelkoop/Aerophoto-Schiphol