It's perhaps fitting that the generic Arabic word for desert, "Sahara", has come to refer in English specifically to the great desert that spans the width of north Africa. As the British explorer Ralph Bagnold observed in Libyan Sands, the Sahara, and particularly the Egyptian Sahara, is the greatest expanse of desert on the planet: "There are deserts and there are deserts. But the Western Desert, a vast expanse that starts at the western banks of the Nile and continues well into Libya is the desert of deserts."
Like the visceral fear that gripped me as I flew over the endless expanse of green of the Amazon, I find the sheer scale of the Sahara queasily un-nerving. It's disconcerting enough to be unable to see anything beyond the endless repetitious dunes in all directions, but the knowledge that in some directions the landscape continues in this vein for a thousand miles is truly terrifying. I don't stray far from the Landcruiser driven by our affable Berber guide, Ibrahim; though the way he pilots the vehicle up and down seemingly sheer walls of sand does little for my nerves. He laughs at his passengers' obvious concern, and with a couple of silent prayers to Allah we're off again, careering across the sand at an improbable angle, trying to build up sufficient speed to mount the crest of the next vertical dune. I'm starting to understand why it's called the Great Sand Sea, as it's all rather reminiscent of The Perfect Storm, though with sand instead of water, and a grinning nomad in a keffiyeh in place of George Clooney.
I visited the Great Sand Sea from the small oasis town of Siwa, close to Egypt's western border with Libya. Despite its incredibly remote location, Siwa has an ancient history dating back to Pharaonic times, when it was famed as the site of the omniscient Oracle of Amun. After invading Egypt in 525BC, the Persian king Cambyses sent an army 50,000 strong to take Siwa and destroy the Oracle, which had - presciently as it turned out - predicted his imminent demise; in a mystery which endures to the present day, the entire force was simply swallowed up by the vast emptiness of the desert and never heard from again. Following his own conquest of Egypt in 332BC, the legendary Macedonian General Alexander the Great made a personal pilgrimage to Siwa, where he was acclaimed by the local priests as the son of a god. In this respect Alexander was a little more successful than a certain Jesus of Nazareth; unlike the rest of the country, Christianity never reached this remote corner of Egypt. Though it did eventually fall to Islam, Siwa's remoteness ensured its unique culture, religion and language endured.
In many respects Siwa is more akin to Libya than Egypt: the people here are Berbers rather than Arabs, and while most locals speak at least some Arabic (certainly more than me), the Berber dialect of Siwi is still very much the lingua franca. Such is Siwa's remoteness in fact, the oasis was only connected to the rest of Egypt by road in the mid-1980s. In many respects Siwa's isolation allows it to exist in a timewarp of mudbrick houses, donkey carts, and candlelight; a display about local culture in the Tourist Office features the immortal phrase: "before the coming of television in 1988".
Siwa is very much an African, rather than Egyptian town, with a grinding poverty the like of which I can scarcely recall seeing before. Although I have now returned, briefly, to Cairo and the Middle East, my sojourn in Siwa very much set the tone for the rest of my journey: I depart tonight by sleeper train to Aswan, from where I will sail across Lake Nasser, bound for Africa. The Sudan.
