trees growing on cliffs in mullerthal near echternach in luxembourg

forest tree woodland wilderness trail plant nature green jungle leaf deciduous trunk sunlight autumn cliffs road mullerthal echternach luxembourg rural region east canton spectacular geological formation walk area located sauertal berdorf waldbillig hiking trails build offer ways explore trees growing cliff erosion edge stone crumbling control eroded root plants earth landslide timber woods bosque arbol baum wald hike path dirt gravel narrow walking leisure travel