Ключевые слова: abstract, america, aspen, aspens, autumn, background, bark, bells, birch, blue, burst, color, colorado, colorful, colors, fall, forest, green, grove, juan, landscape, leaf, leaves, maroon, mountains, national, natural, nature, orange, outdoors, pine, quaking, rocky, san, scenic, serene, sky, sun, sunburst, tree, trees, trunk, usa, vail, western, white, wilderness, woods, yellow,