Ключевые слова: autumn, background, beautiful, boulder, cliff, environment, erosion, fall, foliage, forest, granite, gray, green, hiking, hill, landscape, layer, leaf, mountain, mountaineering, national, natural, nature, outdoor, park, plant, rock, rock layers, scenery, scenic, season, sediment formation, spring, stone, summer, sunlight, trail, travel, tree, trees, view, wall, wallpaper, wild, wilderness, wood,