Chott el Djerid is one of Tunisia's most surreal and fascinating landscapes: a gigantic salt lake, the largest in the Sahara, stretching like a white sea between the oases of Tozeur and the gateway to the desert. At around 7,000 square kilometres, it's so vast that it fills your whole field of view. Its surface is covered with a salt crust that cracks into geometric shapes in summer and holds puddles and mud in winter, so it changes look and colour with the season, the time of day and the light.
Crossing it on the causeway, a ribbon of asphalt tens of kilometres long suspended over all that whiteness, is an unforgettable experience. On both sides the salt turns pink, mauve, gold or blue depending on the time of day, and mirages shimmer on the horizon: in summer the desert seems to flood with lakes, floating islands and distant cities that don't exist, pure optical illusions created by the heat. It's no coincidence that this otherworldly setting was used as a location for the Star Wars films.
This guide covers Chott el Djerid from a practical angle: how and when to cross it to enjoy the mirages and the best colours, where to stop safely, what to buy at its stalls (the famous 'desert roses'), how to get there from Tozeur and what to combine it with. One important warning: never venture on foot onto the salt crust outside the safe areas, because dangerous mud can lie underneath. Seen with respect, the Chott is one of the great natural spectacles of the Tunisian Sahara.
Chott el Djerid is an endorheic basin (with no outlet to the sea) in the Tunisian Sahara, a remnant of the ancient seas and lakes that covered the region in remote geological times. As the climate grew drier, it became a large salt lake that partly fills with rain and runoff in winter and evaporates almost completely in summer, leaving a crust of salt. The ancient Greeks and Romans knew these inland lagoons of North Africa, and some linked them to the mythical Lake Tritonis. For centuries, caravans crossing the desert had to skirt or cross the Chott with great care: its deceptive surface, firm-looking but treacherous because of the pockets of mud and water under the salt, was feared by travellers. In the 19th century, a French engineer even proposed flooding the chotts to create an 'inland sea' in the Sahara, a project that never went ahead. Today, crossed by a modern causeway and famous for its mirages and as a Star Wars location, the Chott is one of the great natural attractions of southern Tunisia. The full story is on our history page.
Read the full history ↓Saharan and Berber Tunisia: the island of Djerba with the oldest synagogue in Africa, the palm oases of Tozeur, the troglodyte houses of Matmata that served as a Star Wars set, and the immense salt lake of Chott el Djerid.
Read the history of The south, the desert and Djerba →They depart from Tozeur, 35 km away. If you book from this link we earn a commission and you pay no more.
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Origins, formation and what the sources say.
Chott el Djerid wasn't always the salt desert we see today. Its story begins long before humanity, in geological eras when the climate of North Africa was very different and much of this region was covered by seas and large lakes. The Chott is the dry remnant of those bodies of water: a vast endorheic basin, meaning a closed one with no outlet to the sea, lying below or level with the surrounding land, where the water and salts carried in by scarce rainfall and runoff build up.
As the Sahara gradually dried out over thousands of years, that humid environment turned into today's arid landscape. The water that still reaches the basin in winter, from rain and seasonal streams, has nowhere to go: it settles in a thin sheet and, once the heat arrives, evaporates almost completely under the relentless sun, leaving the dissolved salts behind. That cycle, repeated year after year for centuries, has laid down a thick crust of salt over the surface of the Chott, which explains its dazzling white appearance.
At around 7,000 square kilometres, Chott el Djerid is the largest salt lake in the Sahara. Its name describes it precisely: 'chott' is the Arabic word for a salt lagoon that dries out in summer and holds some water in the cold season, and 'el Djerid' refers to the 'land of palms', the oasis region that surrounds it. In essence, it is the salty scar of a vanished inland sea, geological evidence of the humid past of a desert that is now one of the driest on the planet.
The great salt lagoons of inland North Africa did not go unnoticed by the peoples of Antiquity. The Greeks and Romans, who knew the Mediterranean coast of what is now Tunisia, had heard of vast expanses of water and salt further inland, at the edge of the desert. Some classical authors linked them to the mythical Lake Tritonis, a legendary lake mentioned in mythology and in the works of ancient geographers and historians such as Herodotus.
According to these traditions, Lake Tritonis was tied to fabulous legends: some placed the birth of the goddess Athena there, or the adventures of the Argonauts, who according to certain accounts sailed or ran aground in those waters before finding their way out to the sea. Exactly which of the chotts of southern Tunisia and Algeria the Tritonis corresponds to is uncertain and has been debated for centuries, but it shows how much these desert lagoons occupied a place in the imagination of the ancient world, as a mysterious frontier between the known and the unknown.
Beyond myth, for the people who lived in the region —Berbers of the oases, and later the successive kingdoms and provinces— the Chott was an everyday and formidable reality: a natural barrier dividing lands, a place feared and respected. Its deceptive surface and sheer size made it a landform loaded with meaning, and stories and warnings about it were passed down from generation to generation. The Chott thus entered human history not just as a physical obstacle, but as a place of legend.
For centuries, Chott el Djerid was a feared obstacle on the trans-Saharan trade routes. The oases around it —Tozeur, Nefta, Kebili, Douz— were stopovers for the caravans that crossed the desert carrying gold, salt, dates, slaves and goods between sub-Saharan Africa and the Mediterranean. But getting from one oasis to another often meant skirting, or even crossing, the immense salt lagoon, and doing so carried a very real danger.
The risk lay in the deceptive nature of the Chott's surface. The salt crust, dry and seemingly firm, could hide pockets of soft mud and brackish water beneath it, capable of swallowing a man, a camel or an entire caravan. There were tracks and crossings known to local guides, who knew where the crust was solid and where it was treacherous, and these were sometimes marked with cairns or landmarks. Straying from the safe route could be fatal. The region's oral tradition preserves tales of lost caravans and of travellers swallowed by the Chott, which only reinforced its grim reputation.
That combination of vastness, silence, mirages and hidden danger made the Chott a place of great respect and fear for those who lived around it and for those who had to cross it. It was not just a feature of the terrain, but a test to be overcome with knowledge, caution and experience. Knowing the safe crossings was valuable know-how, handed down among the desert's guides and caravan drivers, and an essential part of life in the Djerid oasis region.
In the 19th century, Chott el Djerid was at the centre of one of the most ambitious and fanciful projects of the colonial era: the idea of creating an 'inland sea' in the Sahara. Noticing that many of the chotts of southern Tunisia and Algeria lay close to or below the level of the Mediterranean, some European engineers and visionaries came up with an astonishing plan: dig a canal from the Mediterranean to the salt basins and let seawater flood them, creating a great artificial sea in the middle of the desert.
The main champion of this idea was the French engineer and army officer François Élie Roudaire, who from the 1870s enthusiastically promoted the project, arguing that the new sea would transform the region's climate, boost agriculture, ease trade and strengthen the French presence in North Africa. The proposal drew great interest and even won the support of famous figures —Jules Verne himself drew on it for his novel 'Invasion of the Sea'— and studies and surveys were carried out on the ground.
However, the dream ran into reality. More rigorous studies showed that many of the basins were actually above sea level, that the amount of earth to be dug out was colossal and that much of the water would evaporate, making the project unfeasible, hugely expensive and of doubtful benefit. The idea of an inland sea in the Sahara was eventually abandoned, and Chott el Djerid remained what it had always been: a desert of salt. But the episode stands as a testament to the fascination these lagoons held over the imagination of the time.
In the 20th century, Chott el Djerid went from being a feared barrier to a passable place and, eventually, an attraction. The construction of a modern raised causeway road across the salt crust, linking Tozeur with Kebili and Douz, finally made it possible to cross the immense lagoon safely and comfortably. What had been a danger to caravans for centuries became one of the most spectacular journeys in southern Tunisia, open to any traveller.
The Chott's surreal landscape —its endless horizon, its mirages, its shifting colours and its otherworldly surface— also drew the film industry. Like the rest of south-western Tunisia, its surroundings served as a location for the Star Wars films: near the salt lake stood the iconic dome of the Lars homestead exterior, Luke Skywalker's home, which has been restored and is now a place of pilgrimage for fans. The Chott thus became part of the film-tourism map that travellers follow around the region from Tozeur.
Today, Chott el Djerid is one of Tunisia's great natural attractions. Travellers cross it by car or on 4x4 excursions from Tozeur, stop at its viewpoints to watch the mirages and sunrises, photograph the salt crystals and buy 'desert roses' at the stalls along the causeway. It is at once a geological wonder, a place steeped in legend and a visual spectacle that changes with every hour and every season. Seen with respect —without venturing onto its treacherous crust— the largest salt lake in the Sahara still stirs the same wonder felt, over the centuries, by everyone who has gazed out over this white vastness at the heart of the desert.
