schonbuhel an der donau, wachau valley in lower austria

austria austrian danube river danubius donau europe habsburg empire melk schloss schonbohel schonbuhel der upper wachau valley aerial autumn beach blue sky castle clear cliff colors destination scenics drone fairy tale fall forest fortification fortress heritage hill historical idyllic landmark landscape medieval mountain nature people outdoors royal sightseeing tourism tower travel vibrant vivid