Ключевые слова: aerial, aerial view, background, bulgaria, clouds, destination, drone, environment, europe, forest, grass, green, hiking, hill, kupen, kupen peak, landmark, landscape, malyovitsa, mountain, mountaineering, national park, nature, orlovets, orlovets peak, outdoor, panorama, park, peak, recreation, rila, rila mountain, rila national park, rock, rocks, route, scenery, ski, snow, sofia region, sunny, tourism, trail, travel, vacation, view, water, winter,