Salar de Uyuni and Bolivia’s vast salt horizon

Salar de Uyuni in Bolivia is a vast salt flat on the Altiplano, near Uyuni and high in the Potosí Department. Its white crust, broad horizon and near-level surface make the place immediately legible from the ground and from above.

Salt crust on the Altiplano

The salar lies in southwestern Bolivia, within the Daniel Campos Province of the Potosí Department, at about 3,656 m (11,995 ft) above sea level.11,995 feet It is commonly described as the largest salt flat on Earth, and its area is given as about 10,582 square kilometres.largest salt flat

The surface is a salt crust over brine, with a thickness measured in metres in places.salt crust The ground is exceptionally flat, and the average elevation changes by less than a metre across the salar.less than one metre

Lake beds and salt layers

The salar formed from a sequence of Late Pleistocene lakes, whose retreat left behind evaporitic deposits and the basin that survives as the salt flat.Late Pleistocene lakes The present surface rests on salt and brine above older lacustrine mud, a layered structure that gives the site its stark pale colouring.

That layered crust creates the plain white expanse for which the salar is known. It also explains why the basin reads as a continuous surface rather than as a field of separate pools or dunes.

Uyuni, transport and the wider plateau

Uyuni town lies to the south-east and serves as the main gateway to the salar. The surrounding Altiplano is a high plateau in the Andes, and the salt flat sits within that wider upland landscape.Altiplano of Bolivia

The surface also functions as a transport route across the plateau, a practical use that follows from its breadth and flatness.major transport route Around the edges, low hills and saltworks mark the transition from the white basin to the broader Andean terrain.saltworks at Salinas

Visiting Salar de Uyuni: what travellers from Western Europe should know

• The salar is reached from Uyuni, with road access from the town and rail links in the wider region. The route places the salt flat within Bolivia’s Andean interior rather than on the coastal plain.
• The altitude is the main physical factor on arrival. The surface sits around 3,656 m above sea level, so the place reads as an open high plateau rather than a low-lying basin.
• The ground is a salt crust over brine. Its extreme flatness means the horizon can appear uninterrupted across the basin.
• The salar lies within a closed drainage system on the Altiplano. That setting gives it a broad, enclosed character that differs from a river valley or a mountain pass.

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Frequently asked questions about Salar de Uyuni

Where is Salar de Uyuni?

It lies in southwestern Bolivia on the Altiplano, near Uyuni in the Potosí Department. The basin sits high above sea level and forms part of the Andean interior.

What does a visit involve?

The place is an open salt flat with a hard crust and an enormous level surface. The main features are the white ground, the wide horizon and the altitude.

What makes it distinctive?

Its scale and flatness define it, together with the salt crust over brine and the broad Andean setting. The site is also closely associated with the route through Uyuni and the surrounding plateau.