vertical cliff in mullerthal, luxembourg

rock tree stream nature woodland forest garden jungle flower wilderness green plant waterfall water leaf ruins river trail vertical cliff hiking mullerthal luxembourg rural region east canton echternach spectacular geological formation cliffs walk area located sauertal berdorf waldbillig trails build offer ways explore erosion edge stone crumbling control eroded root plants earth landslide hike path dirt road gravel narrow walking leisure travel luxemburg lux grand duchy europe waldbalaquo lleg kanton mafrac14 llerthal