schönburg castle on the rhine river, silhouetted against a cloudless blue sky

oberwesel unesco ancient architecture attraction beautiful blue building burg castle chateau colourful contrast europa europe exterior fortress germany gorge green heritage hill hillside historic landmark landscape medieval mountain nature nestling old red rhine river romantic scenic schloss schoenburg schonburg sky summer tourism tower travel trees silhouetted cloudless rich woodland schnburg schönburg rhineland-palatinate