Niagara Falls is actually made up of three main waterfalls, two which fall mostly in the United States and one which falls mostly in Canada. The Falls in the U.S. are called the American Falls and Bridal Veil Falls, and the falls in Canada are called Horseshoe Falls.
Sometimes, the American Falls are called the Rainbow Falls, and the Bridal Veil Falls are called the Luna Falls.
90% of the water that flows over Niagara Falls flows over the Horsehoe Falls.
The Niagara Falls used to be stronger they are now; these days, a great deal of the Niagara River water is used for hydroelectric power, and the hydroelectric plant runs more strongly at night, when it appears that the falls really slow down quite a bit.
In the last 12,500 years, Niagara Falls has moved 7 miles up the Niagara River, eating away the rock bit by bit as it moves.
Seven people have gone over Niagara Falls in a barrel, in daredevil stunts. Only four of them lived.
Over 20 million people visit Niagara Falls each year.
In 1960, a boat carrying three passengers - a grown man, a teenage girl, and a little boy - flipped over in the rapids above Horseshoe Falls. The teenage girl was pulled to safety at the top of the falls. The man died, either due to the fall or due to the terrible churning waters. The little boy, though, went over the falls and came up at the bottom, wearing his life jacket and relatively unscathed. That little boy, Roger Woodward, was the only known person to survive the Horseshoe Falls and the rapids below without any sort of protection.
Red Hill was a man who grew up in Niagara Falls, and a local legend. He saved as many as 28 people from the waters either above or below the falls, and pulled over 150 bodies from the water during his lifetime.
Niagara Falls dried up in 1848, because an ice storm caused a backlog of ice to build up in the river and essentially dam the river for one day.
The water that flows over Niagara Falls is greenish-blue, because of a combination of algae and crushed slate and shale sediment. Sometimes, after storms, which stir up dirt at the bottom of the river and the Great Lakes, the water briefly turns brown.
At the current rate of erosion, Niagara Falls will be gone in 50,000 years, and will simply be a river that comes directly out of Lake Erie.