The Niagara Falls are the most powerful waterfalls in North America. These voluminous waterfalls are situated on the Niagara River, formed when glaciers receded at the end of the Wisconsin glaciation (the last ice age). While not exceptionally high, the Niagara Falls are very wide. More than 6 million cubic feet (168,000 m3) of water falls over the crest line every minute in high flow, and almost 4 million cubic feet (110,000 m3) on average >>> Wikipedia 1234 next › last » 
