Niagara Falls is located in both the United States and Canada.
The Niagara River forms part of the U.S. Canada border.
There are two falls on the Niagara River, the American Falls in New York State and the Horseshoe Falls in Canada.
All but about 6 percent of the water flows over Horseshoe Falls, which is 158 feet (48 m) high.
The highest waterfall in Canada is Della Falls in British Columbia, at 1,443 feet (440 m).
Niagara Falls were formed when glaciers receded at the end of the last ice age, and water from the newly formed Great Lakes carved a path through the Niagara Escarpment, eventually reaching the Atlantic Ocean.