Sigmaringen Castle reflecting in Danube river, Upper Danube Valley, Swabian Jura, Baden-Wurttemberg, Germany, Europe

vertical travel sigmaringen castle castle fortress built structure architecture danube valley swabian jura baden wurttemberg germany europe danube river river water outdoors day no people cloud sky reflection architectural castles fort forts fortified fortification history historic historical travel destination tourist destination tourist destinations clouds cloudy daytime fortresses past archaeological archaeology ruin ruins old ruin old ruins nobody no one no person outdoor outside rivers flowing water skies