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Niagara Falls is the group name of three big waterfalls on the Niagara River in eastern North America, on the border between the United States and Canada. The three waterfalls are: the Horseshoe Falls, sometimes called the Canadian Falls, the American Falls, and the smaller Bridal Veil Falls. The American Falls and the Horseshoe Falls are separated with Goat Island, and the Bridal Veil Falls separated from the other waterfalls with Luna Island.
Niagara Falls were formed when glaciers receded at the end of the Wisconsin glaciation (the last ice age), and water from the newly formed Great Lakes carved a path through the Niagara Escarpment en route to the Atlantic Ocean.
Although not very high, Niagara Falls is very wide, and is probably the most popular waterfall in the world. The Horseshoe Falls are the largest out of the three falls. It is named the Horseshoe Falls because it looks like a horseshoe.