Ключевые слова: background, balkans, blue, borovets, bulgaria, cirque, clouds, destination, environment, europe, forest, green, highest, hiking, hill, lake, landscape, mountain, mountaineering, musala, nature, outdoor, panorama, peak, recreation, region, rila, rock, rocky, route, samokov, scenery, ski, sky, slope, sofia, stone, summer, sunny, tourism, trail, travel, vacation, view, water,