Niagara Falls, located at the junction of Ontario, Canada, and New York, is the world's first large-span waterfall. The Niagara River is the source of the waterfall. The main waterfall is located in Canada. It looks like a horseshoe. It is the best place to watch the waterfall. In the United States, the waterfall is separated by the Moon Island and the side of the waterfall is observed. Niagara Falls, Iguazu Falls and Victoria Falls are known as the world's three large-span national waterfalls. Waterfalls can be seen on both sides of the river, but the effect is better in Canada. Waterfall town itself is also beautiful. Waterfalls are free to watch. If you go down by boat, it's free. It is suggested that we go down to the waterfall to feel what it is called "shock". Personally, I think it's a must to go to Canada.