Ключевые слова: aerial, aerial view, beli iskar, beli iskar river, borovec, borovets, bulgaria, canyon, drone, environment, europe, forest, gorge, green, hiking, hill, ice, landmark, landscape, mountain, mountaineering, musala, musala peak, nature, outdoor, panorama, pass, peak, ravine, recreation, resort, rila, rila mountain, river, rock, rocks, route, samokov, sight, sightseeing, snow, sofia region, stone, summer, tourism, trail, travel, tree, view, water, winter,