kell, germany - 06 16 2021: cave in a volcano stone cliff in wolfsschlucht, eifel

forest green tree woodland nature sunlight leaf jungle trail plant autumn grass wilderness light morning branch wolfsschlucht tiny river valley laacher eifel wolves gorge surrounded lava stone walls small rivers enters form thin tall waterfall twisted big roots hanging cliffs sides vulkaneifel klamm canyon 2021 kell germany rail throught summer bridge andernach glees wassenach burgbrohl calm crumbling cliff path narrow fallen huge root old air crumbles erosion volcano 2021: cave