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

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