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

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