Victoria Falls is a waterfall in southern Africa on the Zambezi River at the border between Zambia and Zimbabwe. David Livingstone, the Scottish missionary and explorer, is believed to have been the first European to view Victoria Falls in 1855. Livingstone named his sighting in honour of Queen Victoria of Britain, but the indigenous Lozi language name, Mosi-oa-Tunya—”The Smoke That Thunders” continues in common usage as well. While it is neither the highest nor the widest waterfall in the world, Victoria Falls is classified as the largest, based on its combined width of 1,708 meters and height of 108 meters resulting in the world’s largest sheet of falling water. Victoria Falls is roughly twice the height of North America’s Niagara Falls and well over twice the width of its Horseshoe Falls. There are two islands on the crest of the falls that are large enough to divide the curtain of water even at full flood: Boaruka Island (or Cataract Island) near the western bank, and Livingstone Island near the middle—the point from which Livingstone first viewed the falls.