view into the autumnal upper danube valley with bronnen castle, germany

danube upper valley swabian alb autumn baden wuerttemberg germany knopfmacherfelsen bronnen castle view donautal danube upper nature park oberes natural preserve reserve forest tree trees viewpoint lookout overlook scenic landscape nature rock rocky fall season autumnal autumn colors foliage leaves leaf coloration october fortress historic fortification german southern jura travel travel destinations europe outdoor daytime