Ключевые слова: america, american, attraction, beautiful, beauty, blue, boat, border, building, canada, canadian, cruise, day, fall, famous, flow, horseshoe, landmark, landscape, maid, mist, natural, nature, niagara, niagara falls, ontario, outdoor, park, people, popular, power, river, scenic, ship, sightseeing, sky, spray, summer, tour, tourism, tourist, travel, trip, under, usa, view, water, waterfall, wet, wonder,