- large waterfall on the Niagara River: it is divided by an island into two falls, Horseshoe (or Canadian) Falls, c. 160 ft (49 m) high, & American Falls, c. 167 ft (51 m) high
- city in W N.Y., near Niagara Falls (the waterfall)
- city in SE Ontario, Canada, near the waterfall & opposite Niagara Falls, N.Y.
- A city of western New York on the falls of the Niagara River north-northwest of Buffalo. It was settled in the early 1800s after the Americans gained control of Fort Niagara, a strategic garrison at the mouth of the river. The city grew as a tourist destination and is the site of the first commercial hydroelectric plant (1896).
- A city of southeast Ontario, Canada, on the Niagara River opposite Niagara Falls, New York.
aerial view of the Canadian (foreground) and American (background) Falls