Ключевые слова: american, antique, astronomy, attraction, autumn, background, beautiful, blue, boat, canada, cascade, child, childhood, coast, day, daytime, discovery, education, equipment, explore, falls, famous, flow, flowing, fog, glass, green, horizontal, horse shoe falls, instrument, isolated, kid, landmark, landscape, lens, maid, metal, mist, nature, new york, niagara, niagara falls, old, ontario, optical, panoramic, park, rapids, river, rock, scenic, search, shore, sky, space, spray, spring, spyglass, state, telescope, tool, tourism, travel, trees, usa, view, vintage, vision, water, waterfall, wet, white, wonder,