Ключевые слова: aleko, balkans, biosphere, bulgaria, environment, europe, forest, hill, ice, landmark, landscape, meadow, mountain, mountaineering, natural, nature, outdoors, panorama, park, platoto, recreation, reserve, scenics, seasons, sight, sightseeing, ski, skli slopes, snow, sofia, sofia city region, summer, tourism, travel, tree, view, vitosha, vitosha mountain, wilderness, winter, wood,