The Victoria Falls have been billed as the Greatest Falling Curtain of Water on this Planet, making it one of the Seven Natural Wonders of the World as they join the Great Barrier Reef, the Grand Canyon, the Aurora Borealis, the Paricutin volcano, the Harbour of Rio de Janeiro and Mount Everest. Come and see the spectacle, a mile long curtain of water that stretches across the glistening basalt rock, erupts into spray, and then thunders into the canyons below causing double rainbow to rise from the gorge in the sunny afternoons.