Half of a mile-long one of these features is located in Mosi-oa-Tunya National Park, which is the only location in its country home to white rhinos. The rate of retreat (-5[1])of these features is (-5[1])inversely proportional to their height. (-5[1])One of these features (-5[1])was enclosed and destroyed by the creation of the Itaipu Dam in an attempt to draw electricity from that one of these features. Fluvial sediment transport often creates plunge pools at the base of these features. The Garganta del Diablo is a cataract at the base of one of these features along the Iguazu River. For 10 points, one of what feature located on the Zambezi river between Zambia and Zimbabwe is named after Queen Victoria? (10[2])■END■ (10[2])