Ключевые слова: beautiful, canyon, cave, crevice, dark, enormous, environment, footpath, forest, green, hiking, impressive, kuelscheier, landscape, leaf, luxembourg, mighty, moss, mullerthal, mysterious, natural, natural park, natural sign, naturally, outdoor, park, passage, plant, rock, rock face, rough, steep, stone, summer, tourism, tranquil, travel, tree, trunk, vertical, way, wilderness,