The Nile River, the longest river in the world, flows from Lake Victoria in Africa to the Mediterranean Sea near Alexandria, playing a crucial role in the development of ancient Egyptian civilization. The river's valley, known as the 'black land,' was vital for agriculture, while significant monuments such as the temples of Abu Simbel and Karnak were constructed alongside it. The Nile delta is a rich agricultural region that houses a large portion of Egypt's population, notably the city of Alexandria, founded by Alexander the Great.