If you've never visited, book a trip. It is one of the most visited sites in the world.
Standing this close to Niagara Falls you can feel the ground vibrate under your feet. What most people don't realize is that Niagara Falls is moving. Due to the massive force of the water going over the falls constantly they estimate that erosion moves the falls back four to five feet each year.
Niagara Falls is actually divided into two parts. The falls on the the left is on the American side and is known as the American Falls. The falls on the right is on the Canadian side and is known as the Horseshoe Falls. This photo really puts things into perspective. See the little dots in the water? Those are tour boats loaded with people. These are not small boats. These boats have two decks and each must hold several hundred people.
A little closer look at the boats.
Isn't this beautiful? Niagara Falls at night is spectacular!
This is the Niagara River upstream from the falls. This is the scariest body of water I've ever seen. It is illegal to wade in the Niagara River because one slip and the current will carry you right over the falls.
This is the Rainbow Bridge that connects the United States to Canada at Niagara Falls.
This device travels on cables across the Niagara River down stream from the falls. I think it's called a Spanish Gondola and is just one of the many tourist attractions at Niagara Falls.