Aggstein Castle ruin on Danube River at sunset, Cultural Landscape Wachau, UNESCO World Heritage Site, Austria, Europe

photography colour colour image color color image horizontal horizontal image outdoors outside sunset nobody no one no one travel travel destination travel destinations danube river aggstein castle ruin cultural landscape wachau castle wachau lower austria austria europe european building exterior building buildings architecture architectural history historical historic heritage river water fort forts fortified fortification fortress fortresses medieval rock landmark landmarks famous well known well known lens flare flare sunburst high angle view high angle scenics scenic scene scenes scenery landscape landscapes