Sigmaringen Castle at sunset, 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 sunset dusk building exterior building no people clear sky sky reflection dam fuel and power generation control hydroelectric power architectural building exteriors architectural exterior architectural exteriors buildings castles fort forts fortified fortification history historic historical travel destination tourist destination tourist destinations blue sky sundown evening twilight fortresses past archaeological archaeology ruin ruins old ruin old ruins nobody no one no person outdoor outside rivers flowing water skies