wachau valley

austria wien wachau danube church castle wine relax travel europe eurotrip sky no clouds dabube valley melk st polten boat morning sun landscape villages artstettenpbringeurope donau unesco heritage scenic world vineyard famous river romantic site rural tourism durnstein picturesque view trees town stone water historic landmark green fortress panoramic medieval forest old panorama nature cultural farm agriculture village tower viticulture renowned spitz terraced graben austrian monastery outdoor duernstein