At 4,180 miles (6,688 kilometers) long, the ancient and famous Nile River in Africa can lay claim to the title of longest river.
The Nile flows from Lake Victoria, on the equator, and twists and turns (an indication of its old age) to its mouth, or outlet, on the Mediterranean Sea.
Some experts claim that the Amazon River in South America is actually longer than the Nile. The difference of opinion stems from how the river’s distance is measured.
If you take into account all the interconnecting tributaries, or side rivers, the Amazon is the longest.