Ключевые слова: autumn, balkans, biosphere, branch, bulgaria, cloud, colors, environment, europe, fall, forest, grass, green, hill, landmark, landscape, leaf, meadow, morning, mountain, mountaineering, mystery, natural, nature, outdoors, panorama, park, peak, peninsula, plant, recreation, reserve, scenery, scenics, seasons, sky, sofia, sofia city region, tourism, travel, tree, view, vitosha, vitosha mountain, wilderness, wood, woodland, yellow,