Ключевые слова: adventure, alpinism, background, banner, beautiful, beauty, blue, bulgaria, calm, clear, clouds, color, day, destination, environment, hiking, hill, lake, landscape, mountain, mountains, national, natural, nature, nobody, outdoor, outdoors, pano, panorama, panoramic, park, peaceful, peak, rila, rock, scenery, scenic, serenity, sky, spring, stunning, summer, tourism, tranquil, travel, trip, vacation, valley, view, water,