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