Ключевые слова: autumn, beautiful, breathtaking, brook, bulgaria, cascade, chute, colorful, countryside, creamy, creek, ecology, environment, fall, flow, flowing, foliage, forest, green, landscape, leaves, lush, mountain, national, natural, nature, outdoor, outside, park, picturesque, pristine, rila, river, rock, running, rushing, scenery, splash, spring, stream, torrent, tree, untouched, vegetation, vibrant, vivid, water, waterfall, wilderness, wonderful,