Ключевые слова: adventure, america, arid, beautiful, blue, canyon, cave, cliff, desert, dry, erosion, famous, formation, geological, geology, ground, hill, land, landmark, landscape, landscapes, mountain, mountains, national, natural, nature, outdoors, park, red, rock, rocks, rocky, sand, sandstone, scene, scenery, scenic, sky, spain, stone, summer, terrain, tourism, travel, vacation, valley, view, volcanic, volcano, wilderness,