Niagara Falls (waterfall), waterfall in east central North America, located on the Niagara River, in western New York and southeastern Ontario.
Niagara Falls consists of two cataracts: the Horseshoe, or Canadian, Falls (57 m/187 ft high), on the Canadian side of the river, and the American Falls (55 m/182 ft high), on the United States side.
The waterfalls are separated by Goat Island, New York.
Niagara Falls is a great tourist attraction, luring millions of visitors each year. The falls may be viewed from parks located on either side of the river, from observation towers, from boats, from Goat Island, and from the Rainbow Bridge, located a short distance downstream.
Visitors also may enter the Cave of the Winds, situated behind a curtain of falling water near the base of the American Falls.