The Nile, Egypt
Life along this 6,853km north-flowing river, generally regarded as the longest in the world, is an interesting mix of ancient and modern. The Nile runs from the mountains in East Africa to the Mediterranean. Studies have shown the River (Iteru, meaning, simply, River, as the Egyptians called it) gradually changed its location and size over millions of years. On a cruise between Aswan and Luxor, you can see the temples at Kom Ombo, Edfu and Esna. Bolder explorers can sail for longer, heading to Dendera and Abydos, which can take up to 12 days.