It also has extremely large cities, it is difficult to believe that all this began with a civilization, although very advanced, but isolated in a small corner of life from the Nile. and (as has probably been permanently etched in your mind) the Nile, the longest river in Africa and the second longest river in the world, just 87 miles behind the 4,345 mile long Amazon ( I can't believe I forgot to mention this until now) but yes, the Nile is 4,258 miles long, which is 1,338 miles longer than Africa's second longest river, the Congo, which measures 2,920 miles.