Ключевые слова: adventure, ancient, architecture, attraction, beautiful, building, canyon, cave, cliff, culture, dark, desert, erosion, famous, forest, formation, geological, geology, heritage, historic, history, hole, inside, landmark, landscape, light, limestone, mountain, national, natural, nature, old, outdoor, park, rock, sand, sandstone, scenic, stone, tourism, travel, tree, tunnel, underground, view, wall,