Castle Aggstein overlooking the River Danube in the Wachau at sunset, Austria, Europe

photography colour colour image color color image horizontal horizontal image outdoors outside nobody no one no one sunset castle aggstein river danube wachau austria europe european elevated view scenics scenic scene scenes scenery castle building exterior building buildings architecture architectural landmark landmarks famous well known well known history historical historic heritage valley landscape landscapes river water high angle view high angle view over rural scene rural scenes rural hill castle medieval lens flare flare sunburst aggstein castle ruin 14th century