medieval bridge with a hidden castle

elztalwasserfall fortification springtime mountains monastery medieval volcanic southern waterway building volcano pyrmont terrain village geology tourism bridge hidden castle cliffs elztal winter spring eifel hills slate river early stone eagle ruins cliff plant house cold road late area burg wall rock tree low sun elz icy day old bridge building deterioration connection crossing valley wall ground ruin ruined ruined house destruction destroyed old ancient forest lost place abandoned stones history historic