reservoir höllensteinsee with run-of-the-river hydroelectricity power station near viechtach in bavarian forest, germany

reservoir hapara llensteinsee lake bavarian forest tree viechtach hydroelectricity power station runoftheriver water schwarzer regen panorama view hiking outdoor nature landscape scenery landmark building architecture facade attraction picturesque famous tourism holiday vacation summer journey trip travel sightseeing bavaria germany europe höllensteinsee run- -river run- - -river