river, hills and volcanic landscape against stormy sky

background beautiful beginning blue bonn castle cloud clouds cloudy coast colorful copy cumulonimbus day drachenburg drachenfelsdragonrock dramatic dramatical europe evening forest germany green hill hills island lake landscape may mehlem mountain mountains natural nature outdoor panorama people rhine river riverside rock romantic scenery scenic sea sevenhills sky space storm stormy summer thunderstorm tourism travel tree vacation view vineyard volcanic water waterfront