Located on the Niagara River, which drains Lake Erie into Lake Ontario, the combined falls form the highest flow rate of any waterfall in the world that has a vertical drop of more than 50 m. Horseshoe Falls is the most powerful waterfall in North America, as measured by vertical height and flow rate. The falls are 27 km north-northwest of Buffalo, New York, and 121 km south-southeast of Toronto, between the twin cities of Niagara Falls, Ontario, and Niagara Falls, New York.
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. While not exceptionally high, the Niagara Falls are very wide. More than 168,000 m3 of water falls over the crest line every minute in high flow, and almost 110,000 m3 on average.The Niagara Falls are famed both for their beauty and as a valuable source of hydroelectric power. Balancing recreational, commercial, and industrial uses has been a challenge for the stewards of the falls since the 19th century.

































