Niagara Falls is the most well-known waterfall in the world! Surprisingly, this is not the world’s highest waterfall. It’s also not the world’s largest waterfall. It does, however, surpass all other waterfalls in the world in terms of sheer volume of water. The Niagara River connects the states of New York and Ontario in Canada. This comprehensive travel guide concentrates on the Canadian side of Niagara Falls.