Aswan, a city on the Nile River, has been southern Egypt’s strategic and commercial gateway since antiquity. It contains significant archaeological sites like the Philae temple complex, on Agilkia Island near the landmark Aswan Dam. Philae’s ruins include the columned Temple of Isis, dating to the 4th century B.C. Downriver, Elephantine Island holds the Temple of Khnum, from the Third Dynasty.