What can I say about Niagara Falls except that I was there and here's the pics for proof:
The picture above was taken from the observation tower on the Canadian side.
This is a picture of the American Falls from the Canadian side.
Here's another picture of the Canadian Falls at sunrise:
Every true waterfaller has got to see Niagara at least once but it's a little too commercialized for me (and a little too crowded ). Click here to check out some more pics of the falls (you'll be glad you did!).