5 Highest Waterfalls in the World

Niagara Falls is the first waterfall that comes to mind for many of us. But is it even one of the biggest? Some of the highest falls have rarely been seen by human eyes.

One category some nature enthusiasts go crazy over is waterfalls. Although a waterfall seems simple in nature -- it's usually a river that plunges over a rocky ledge into a pool of water, only to continue flowing as a river --… » Full Story on HowStuffWorks