wind beaten grassland at the rodder maar, caldera lake in the eifel

windswept wind wetland waterway water volcanic unique typical tree tranquil tall surrounded stretch sky setting serene scattered rolling rodder river reservoir region reflects reflection peaceful nature natural meadow marsh maar lush leaning landscape lake indicative history hills hill highland greenery grasslands grassland grasses grass germany geological formations form forest features eifels eifel edge dense clouds cloud caldera blue beaten backdrop atmosphere area adding volcano vulcanic rural remote calm quiet leisure idyllic