Ключевые слова: aerial, aerial view, borovec, borovets, bulgaria, drone, environment, famous, forest, green, hiking, hill, ice, landmark, landscape, lift, markudjik, mountain, mountaineering, musala, musala peak, nature, outdoor, panorama, peak, recreation, resort, rila, rila mountain, rock, rocks, route, samokov, scenery, sight, sightseeing, sinnyakovo, ski, ski slopes, snow, sofia region, sport, stone, tourism, travel, tree, view, water, winter,