Ключевые слова: beautiful, beauty, boulder, bulgaria, canyon, cascade, creek, current, dramatic, fast, flow, flowing, flowing water, foliage, grass, green, hiking, landscape, motion, mountain, mountain river, mountains, natural, nature, outdoor, powerful, rapid, river, rock, rocky, scenery, scenic, splash, splashing, stone, stormy, stream, summer, tourism, travel, tree, turbulence, turbulent, vacation, valley, water, wave, wet, wild, wilderness,