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