With a population of about 23,000, Siwa, the most inaccessible of all Egypt's oasis until very recently, is also one of the most fascinating, lying some 60 feed below sea level.. On the edge of the Great Sand Sea, its rich history includes a visit from to consult the Oracle of Amun - The current rage is the Bahariya oasis, where the valley of the golden Mummies was discovered not too long ago, and where new discoveries seem to be cropping up almost continuously. However Siwa Oasis where Alexander the Great visited the Oracle of Amun in 331 BC has been for many years a consistent favourite among the oasis. While the Western desert is sometimes the primary destination for tours, it is more often an add-on for the more common classical tours.