Hohenwerfen castle and fortress above the Salzach valley at Werfen on Austria. hohenwerfen, castle, austria, view, medieval, valley, werfen, salzburg, old, rock, landscape, building, wall, europe, mountain, landmark, tower, historic, hill, fortification, nature, fortress, summer, travel, architecture, ancient, forest, alpine, fort, town, sky, stone, history, european, burg, salzach, famous, palace, germany, german, alp, blue, alps, high, background, citadel, tree, traditional, city, scenic