10. Niagara Falls (USA/ Canada)
Acknowledged as one of the biggest attractions in both America and Canada, Niagara Falls is actually three falls in one. The three falls are named, Bridal Veil Falls, American Falls and Horseshoe Falls, from smallest to largest. More water flows over Niagara than over any other waterfall in the world, and it has long attracted dare-devils and risk-seekers of all kinds.