Ключевые слова: barrier, blue, canada, canada side, cascade, creek, dam, environment, fall, falling, falls, flow, flowing, forest, fountain, landscape, mist, misty, mountain, nature, niagara falls, niagara river, obstruction, outdoor, outdoors, panorama, park, river, rock, sky, spring, stone, stream, structure, tourism, travel, tree, water, waterfall, wilderness,