aerial top-down view of hinterhaus castle ruins in wachau valley, austria

waterway water walls wall wachau vineyards view valley unique tree travel transport towers tower tourism topdown terrain surrounded strategic stone shot screenshot scenic ruins rock rich reveals reflection mountain medieval lush location layout landscapes landmark ideal history historic hinterhaus highresolution highlighting heritage greenery green fortress enthusiasts drone dramatic defensive courtyards cliff castles castle captures austrias austria ancient aerial castle valley austria ruins top-down view architecture fortress walls towers cultural heritage historical landmark european castles old stronghold landscapes nature history austrian tourism site remains fortified shot bird's-eye conservation austria