arribes del duero natural park, spain

riverbed water valley river eroded mediterranean mountain ravine canyon gorge dedile geology geopark geomorphology scrub forest variegated foliage silence landscape nature wildlife environment biosphere tourism ecotourism tranquil scene view scenery tranquility conservancy beauty cute beautiful ecosystem habitat ecology landscapescenary scenicsnature spa sac bioreserve natural park conservation area arribes duero salamanca castile leon spain europe riverside del reserve castilla leapound asup3