Sigmaringen castle, Upper Danube nature park, Danube river, Baden-Wuerttemberg, Germany

sight natural preserve baden wurttemberg architecture europe clear sky landscape nature landmark sigmaringen baden wuerttemberg historical buildings beauty in nature travel scenics swabian alp natural beauty castle day evening sky water landmark dusk outdoors travel destination tranquil scene nature reserve park river sigmaringen castle blue sky national landmark danube reflection germany upper danube nature park