The River of Africa is a term used to describe the continent's many rivers. The Nile, with four letters, is the longest river in the world and runs through Egypt, Sudan, and Ethiopia. The Uele, also with four letters, is a tributary of the Congo River located in the Democratic Republic of the Congo. The Niger, with five letters, is the third-longest river in Africa and flows through Nigeria, Niger, Benin, and Cameroon.