In the southern Africa dwells a magnificent waterfall called the "The Smoke that Thunders". Through the surrounding flat plateau, the Zambezi river flows between the countries of Zambia and Zimbabwe. A large crack in the underlying Basalt Rock shape Victoria Falls, where the full width of the river forms the largest curtain of falling water in the world. In the rainy season the spray from the falling water forms vivid rainbows in the daytime and moonbows under the full moon. Daring visitors swim in the Devil's Pool, right on the edge of the falls.