hiking trail between the massive rocks in mullerthal, luxembourg

woodland forest tree vegetation green jungle plant wilderness flower trail stream leaf deciduous garden 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 massive rocks luxemburg lux grand duchy europe waldbalaquo lleg kanton mafrac14 llerthal erosion edge stone crumbling control eroded root plants earth landslide hike path dirt road gravel narrow walking leisure travel