Ключевые слова: amazing, balkans, biosphere, branch, bulgaria, christmas, environment, europe, forest, gorgeous, grass, green, hill, landmark, landscape, leaf, meadow, mountain, mountaineering, mystery, natural, nature, outdoors, panorama, park, peninsula, plant, recreation, reserve, road, scenics, seasons, ski, sky, snow, sofia, sofia city region, tourism, travel, tree, trees, view, vitosha, vitosha mountain, wilderness, winter, wood, woodland, yellow,