Howard Hillman is a well-known travel writer. He has a web site called Hillman Wonders of the World. I’m not sure how the rankings come about, but currently Niagara Falls is ranked 88th.
Why Niagara Falls is special
It is one of the mightiest falls on earth. Although Niagara Falls is smaller and less breathtaking than Iguazu Falls in South America and Victoria Falls in Africa, it is awe-inspiring in its own right.