The Nile is famous as the longest river in the world. The river got its name from the Greek word Neilos, which means valley. The Nile floods the lands in Egypt, leaving behind black sediment. That’s why the ancient Egyptians named the river Ar, which means black.Not only is the Nile River one of the main rivers of Egypt, but many would in fact; say it is the primary river of Egypt. The Nile River has definitely played a critical role in the history of this fascinating nation.Today, exotic and sophisticated cities like Cairo grace the banks of the Nile River, as they have for thousands of years. Those who are interested in experiencing the Nile up close and personal can journey along the famous river aboard riverboat cruises that depart from numerous cities along the bank.