The Nile is a river located in northeastern Africa that is known for its blue and white tributaries. It is the longest river in the world, stretching over 4, 000 miles from its source in Burundi to its mouth in Egypt. The Nile is an important source of water for many countries in the region, including Sudan, Ethiopia, and Egypt. It is also home to a variety of wildlife, including crocodiles, hippos, and fish.