aerial view dutch island rottumerplaat, coastline with mudflats and channels

aerial background beach channel channels coast coastal coastline dutch ebb flat flats friesland gaunt holland island landscape low marsh marshland mud mudflat mudflats natural nature netherlands outdoor panorama rottum rottumeroog rottumerplaat sand schiermonnikoog sea seacoast seashore seaside shore tidal tide uninhabited unoccupied view wadden waddensea water wetland wetlands