Aswan High Dam
Built in the 1960s, the Aswan High Dam was an engineering marvel at the time and changed the face of Egypt. It increased the cultivable land by 30% and doubled Egypt's available electricity supply. It also created Lake Nasser, at the time the world's largest artificial lake, which would have covered the important Abu Simbel Temple monuments if not for the support of UNESCO and a worldwide appeal for funds to move them to higher ground, a massive feat which was successfully achieved.
The dam itself is massive, containing 18 times the material used to build the famous Pyramid of Cheops at Giza. It is 11,811 feet (3,600 meters) long, 3,215 ft (980 m) thick at the base, and 364 ft (111 m) tall. Today, it provides visitors with wonderful views up and down the Nile River.
The dam is near Aswan, at one end of Lake Nasser. It is best visited by organized tour where you take in other sites at the same time, including the Philae Temple.