Ключевые слова: aerial, aerial view, background, bulgaria, circus, destination, environment, europe, forest, green, hiking, hill, kupen, kupen peak, lake, landmark, landscape, malyovica, malyovitsa, mountain, mountaineering, national park, nature, outdoor, panorama, park, peak, prekorech, prekorech circus, recreation, rila, rila mountain, rila national park, rock, route, scary, scary lake, scenery, sight, sightseeing, sofia region, stone, strashnoto, summer, the scary lake, tourism, trail, travel, view, water,