Ключевые слова: aerial, aerial view, background, borovets, bulgaria, cirque, destination, drone, environment, europe, famous, green, hiking, hill, lake, landmark, landscape, mountain, mountain lake, mountaineering, musala, musala lakes, musala peak, musalenski, musalenski lakes, nature, outdoor, panorama, peak, recreation, rila, rila mountain, rock, rocks, route, samokov, scenery, sight, sightseeing, ski slope, skis, sofia region, stone, summer, sunny, tourism, trail, travel, view, water,