cave in the volcano stone with a simple seat

tree trail woodland wilderness forest soil nature plant autumn wildlife wetland stream leaf flower wood branch grass jungle monastery ruin tönnisstein eifel called kloster sankt antoniusstein located valley wolfsschlucht brohltal carmelites höhlen- schluchtensteig eifelsteig network touristic hiking trails burgbrohl germany 2022 narrow path cliff winter vulkaneifel stairway volcano stone glees andernach wassenach abandoned ruined lost place ruine remaining side wall former cave simple seat