Sigmaringen castle in the evening light, Upper Danube nature park, Danube river, Baden-Wuerttemberg, Germany

sight trees nobody baden wurttemberg natural preserve architecture europe landscape nature landmark illumination sigmaringen historical buildings baden wuerttemberg bridge beauty in nature travel scenics swabian alp bridge natural beauty castle day water landmark travel destination outdoors tree tranquil scene nature reserve park river sigmaringen castle national landmark danube reflection germany upper danube nature park