mudflats and tideway marked with wooden poles at low tide of waddensea near west frisian island schiermonnikoog, netherlands

channel coast coastal creek dutch ebb europe european flat flats friesland frisian gullies gully holland island landscape low mud mudflat mudflats nature netherlands panorama poles sand sandflat sandflats schiermonnikoog sea tidal tide tideway wadden waddensea water west wetland wetlands wooden