Ключевые слова: background, bulgaria, bulgaria photos, clear, destination, environment, europe, forest, grass, green, hut, lake, landscape, lodging, mountain, mountain lakes, mountaineering, nature, outdoor, recreation, reflection, rila, rila mountains, route, scenery, sun, sunny, the eye, the eye lake, the kidney, the kidney lake, the the seven rila lakes, tourism, trail, travel, tree, view, water,