Ключевые слова: america, american, background, beautiful, beauty, blue, border, canada, canadian, cloud, environment, falls, formation, fresh, garden, green, horseshoe, landmark, landscape, monument, movement, national, natural, nature, niagara, outdoor, panorama, panoramic, park, river, rock, scenery, scenic, season, sky, spring, steep, stone, stream, summer, swift, tourism, tourist, travel, vacation, visit, water, waterfall, white, wild,