Ключевые слова: aerial, aerial view, balkan, balkans, bulgaria, bulgarian, canyon, cascade, countryside, defile, ecology, environment, europe, fall, forest, gorge, hiking, hill, iskar, iskar gorge, landmark, landscape, location, mountain, nature, outdoor, panorama, river, rock, scenic, sight, sightseeing, sky, sofia, sofia region, stara planina, stara planina mountain, terrain, tourism, touristic, trail, travel, trees, trip, vacation, view, village, water, zasele,