He then backed up slightly, I assumed to turn around. Instead, the vehicle lurched over the edge and plunged down the steep slope at breakneck speed.
This is the only way to begin a desert safari in the Great Sand Sea, 28,000 square miles (72,000 square kilometres) of rolling dunes along the northern edge of the Sahara, one of the main attractions of a visit to the Egyptian oasis of Siwa.
Siwa, a Berber town of some 27,000 people roughly 450 miles (about 725 kilometres) southwest of Cairo, was largely inaccessible to the outside world until the 1980s, when the road that leads to the closest city of Marsa Matrouh was paved, putting it on the tourist map.
It's an admittedly daunting trip for all but the most adventurous travellers: A day's journey along a dreary highway from Cairo by bus or car. But the reward for making the trek is a glimpse of what paradise might look like.
Home to the oracle that is said to have confirmed Alexander the Great descended from the gods, Siwa isn't much at first sight a collection of mud-brick huts and concrete apartment blocs in one of the most isolated parts of Egypt.
But the labyrinthine old town and a jagged, conical Roman-era necropolis soon rise in front of you, inspiring a feeling of awe for a place stuck between its ancient past and modern times.
The palm tree-lined area's isolation along with natural springs, ancient ruins and of course, a roller coaster ride through the desert are the main draws for tourists willing to make the trek.
A friend and I stayed at the Ghaliet Ecolodge and Spa, which is built around a date palm grove with buildings made of traditional mud and salt bricks known as kersheef. Owner Magdy Riad swears no trees were displaced, pointing to branches sprouting from the roofs.
The 12-room hotel, just outside the town centre, is one of several ecolodges designed to blend into the surroundings. The more expensive Adrere Amellal, the choice of Britain's Prince Charles and his wife Camilla in 2006, was closed for renovation in early September.
The Ghaliet staff welcomed us and my with hibiscus juice and cold towels before letting us choose between a room with a skylight and terrace overlooking a garden, or one downstairs near the pool. We chose the upstairs room decorated with charming woodwork and colorful Bedouin rugs.
Arriving weeks before the start of winter high season, we were happy to be the resort's only guests but worried about the viability of businesses reeling from the steep drop in visitors to Egypt.
Tourism revenues in Egypt fell 30 per cent to $9 billion in 2011, although the industry has started to show signs of recovery. Siwan businesses also suffered from worries over Libya's civil war just 30 miles (50 kilometres) away. The vast desert that separates the two countries was a route for rebels smuggling weapons to fight Moammar Gadhafi.
Riad, a member of Egypt's Coptic Christian minority, had bad timing. He opened the villa-style resort in December 2010, about a month before the start of protests that ousted Egypt's leader Hosni Mubarak and inspired Libyans to launch their own uprising.
Worried about his family back in Cairo, Riad says at first he left Siwa to join protesters in Tahrir Square, saying "they had the right to change the regime."
But like many Egyptians, his enthusiasm gradually waned as as crime rose with the collapse of the police state, and the growing Islamist influence raised Christian fears of persecution. Riad's wife and daughter recently moved out of the country after he was threatened by an Islamist cleric who objected to the spa services. But he enjoys good relations with local clans and reopened the hotel last October.
The heart and soul of the hotel, Riad cooked our first meal himself. His spa staff was on vacation, but as a trained masseur, he offered us massages and facials. He also acted as tour guide, designing a packed itinerary for our four-day stay.
Our room had no curtains, so the sun was our wakeup call. Donkeys brayed as they dragged carts along the dirt road outside Siwa's rush hour. But it was easy to get up as the aqua pool beckoned, with breakfast served in the shade of date palm trees. After coffee, omelets, cheese spread and breakfast salsa with freshly made flat bread, we jumped in the pool and swam until our afternoon tour of historic sights.
First was the Temple of the Oracle, where Alexander the Great came in 331 BC to confirm that Zeus was his father.
For 25 Egyptian pounds (about $4) each, we tried to absorb the lingering wisdom of the oracle and enjoyed the view of the maze of mud hut roofs below as well as the Mountain of the Dead filled with rock-cut tombs dating to the Ptolemaic and Roman periods.
We then hiked around the winding paths lining the steep Fortress of Shali, with stores at its base selling traditional handicrafts. The merchants were eager but not pushy, unlike more aggressive vendors in Cairo.
The area is dotted with bubbling hot and cold natural springs, which irrigate the thick date palm and olive groves. One of the most popular is Cleopatra's Bath, a deep, round natural spring where tourists can take a dip while shopping for souvenirs.
The driver then took us to a vast salt lake reminiscent of the more famous Dead Sea but without the infrastructure. You can float in the lake for a while, then soak in a nearby freshwater spring to wash off the salt.
Back at the hotel, Riad administered much-needed massages in a top-floor studio with an open roof and nighttime view of the stars.
A tuk-tuk carried us to dinner at Abdu, a restaurant serving Middle Eastern fare such as lamb kebabs, hummus and baba ghanoush.
The next day started with a swim followed by facials. The open roof wasn't so lovely under the glaring sun, but a straw cover was put in place to block it out.
Then Riad introduced us to our desert guide Ahmed Bakrin, with assurances that he was a very safe driver. We soon found out why that was important as the four-wheel drive raced up and down the wavelike dunes.
He slowed down as we approached Bir Wahed, a beautiful blue freshwater lake surrounded by cattails that whispered in the wind.
We had the place to ourselves for a half-hour until an Egyptian family arrived, followed by a rowdier group of Italian tourists. We jumped back into the Land Cruiser and sped to the next surprise, a sulfur-infused hot springs.
The next thrill was sandboarding. As I hesitated, Bakrin, who has been taking tourists through the desert for a decade, told me to close my eyes and gave me a push, sending me soaring down the dune. Going up wasn't as much fun: For every one foot up, the sand pulls you two feet back.
A crunchy patch of white in the sand turned out to be a marine fossil bed from when the area was submerged in a prehistoric ocean.
Our adventure ended with mint tea made over a bonfire and dinner served in the desert. We ate under the stars while a desert fox lingered in the distance, hoping for some leftovers.
If You Go...
GETTING THERE: Siwa is about 450 miles (about 725 kilometres) from Cairo, about eight hours by car or 12 by bus. You can also take the bus from Alexandria or fly to the nearest city of Marsa Matrouh, but it's still a 200-mile drive (about 725 kilometres) from there. A nearby military airport sometimes hosts charter flights.
WHERE TO STAY: Ecolodges and hotels include Ghaliet Ecolodge and Spa, http://www.ghaliet.net/ghaliet.htm ; Adrere Amellal, http://adrereamellal.net/index2.html , Taziry, http://taziry.com/ . Rates vary by date and type of accommodation; for November, Ghaliet has rooms available under $100, Taziry, under $200 and Adrere Amellal upwards of $300.
Follow Kim Gamel at http://twitter.com/kimgamel