A large waterfall is also known as a cataract.
A cataract is a waterfall but with great volumes of water falling over a precipice, that is to say, large. In here, the water flows abruptly.
Some of the largest cataracts in the world are the Angel Falls or Salto Ángel in Venezuela, The Niagara Falls located between the U.S. and Canada and The Victoria Falls on the border between Zimbabwe and Zambia.