windwatermill draining wetland polder, water level control in national park alde feanen, friesland, netherlands

agriculture alde blue bog copy countryside dike ditch drainage draining dutch earnewald eernewoude europe european farming farmland feanen field friese friesland frisian fryske fryslan grass grassland green holland horizon landscape marren meadow meren mill moor moorland national nature netherlands oude oudega panorama park pasture peat polder reserve rural sheep sky smallingerland space sunny vast venen water watermill wetland windmill windwatermill