With a length of 6,650 km (4,132 miles) Nile River occupies first place in the list of top 10 longest river in the world. Located in Africa, the Nile River runs through by ten countries, namely, Sudan, South Sudan, Burundi, Rwanda, Democratic Republic of the Congo, Tanzania, Kenya, Ethiopia, Uganda and Egypt.
Amazon River, South America
At 6,400 km (3,976 miles) in length, Amazon River secures second spot in this list. During the wet season, the Amazon River can reach over 190 kilometres (120 miles) in width. Amazon River is also known to have the largest drainage basin in the world (7,050,000 km2) which accounts for nearly one-fifth of the total river flow of the world. The river flows through Guyana, Ecuador, Venezuela, Bolivia, Brazil, Colombia and Peru. About 250 species of mammals, 3,000 kinds of fish, 10,000 kinds of trees, 70,000 plants, and 1,800 different kinds of birds live along the Amazon River.