Ключевые слова: aerial, aerial view, amazing, balkans, biosphere, bulgaria, drone, environment, europe, forest, hill, konyarnika, lake, landmark, landscape, meadow, mountain, mountaineering, natural, outdoors, panorama, park, recreation, reserve, river, scenics, seasons, sight, sightseeing, small, snow, sofia, sofia city region, stone, stone river, summer, tourism, travel, tree, trees, view, vitosha, vitosha mountain, wilderness, wood,