park at the caldera lake in autumn

tree garden flower plant lawn estate yard park shrub backyard grass leaf woodland autumn memorial green waterway calm gloomy caldera lake ulmen small town eifel called ulmener maar youngest volcanic lakes area old castle ruin located stretches hill autobahn separates rural vulkaneifel extreme west germany ruins half-timbered medieval architecture volcano vulcanic nature forest remote natural quiet leisure idyllic landscape young lake area located architecture