Waterfalls

Waterfalls are a type of landform, usually in the form of streams (having stream bed and banks) that flow from a height or down a slope, such as water flowing from steep cliffs or precipices. The water source of waterfalls varies, based upon the origin. For example, the water sources can be glaciers, rivers, streams and even creeks. It is a fact that two of the fifteen largest waterfalls are glacier fed; whereas, majority of the remaining have their sources in rivers.

Waterfalls occur in each and every continent, except in Antarctica. The Angel Falls, located in Venezuela (South America) is the largest waterfall in the world, with its height measuring 979 meters (3,212 feet). In terms of numbers, Norway leads the list with five of the largest waterfalls.
Read more at http://en.wikipedia.org/wiki/Waterfall