One of the (25) ______________ waterfalls in the whole world lies on the Zimbezi River, which forms the border between Zambia and Zimbabwe. Some people think it is one of the most beautiful sights (26) ______________ the world. Upstream, the river flows through a wide valley. You could probably (27) ______________ Victoria Falls from 25 to 40 miles away and see its spray rising 1,000 feet into the air of seven miles away. Long before you even see the waterfalls you can (28) ______________ the roaring of the water. Victoria Falls was discovered by David Livingstone in 1855. The falls were named in honor of Queen Victoria. There is no doubt that Victoria Falls is a wonder of the natural world.