Salar de Uyuni: Formation, Geology & The Worlds Largest Salt Mirror
Across more than 10,000 square kilometers, the elevation difference is barely around one meter.This is almost impossible in natural landscapes. The foundation of Salar de Uyuni goes back to a sequence of lakes that filled the Altiplano basin during the Pleistocene.In the past, huge inland lakes—like the prehistoric Lake Minchin—covered the region. Lisa is a writer and traveller who left her nine-to-five in London for life on the road.
What to pack for Salar de Uyuni trip
Due to lack of conventional construction materials, many of them are almost entirely (walls, roof, furniture) built with salt blocks cut from the Salar. Salar de Uyuni is estimated to contain 10 billion tonnes (9.8 billion long tons; 11 billion short tons) of salt, of which less than 25,000 t is extracted annually. Lithium is concentrated in the brine under the salt crust at a relatively high concentration of about 0.3%. The brine is a saturated solution of sodium chloride, lithium chloride, and magnesium chloride in water. During the wet season, Titicaca overflows and discharges into Poopó, which in turn, floods Salar De Coipasa and Salar de Uyuni. If travelling to Uyuni by bus you will arrive early in the morning (around 6 or 7 am) and most tours begin at around 10 am, giving you time to scout around for a tour you like. During this time the salt is covered by a layer of water that provides a dramatic mirror effect and creates unique conditions for fabulous photos. At this time of year you will enjoy the quintessential views of the salt flats, with vast expanses of white landscape extending to the horizon. Today they create an eerie environment and stand as a testament to the corrosive power of salt! The first stop on most tours is the Train Graveyard (El Cementerio de Trenes) on the dusty outskirts of Uyuni. The deserted plain is the perfect canvas for taking perspective photographs and when covered in a layer of water it becomes the world’s largest mirror, which makes for stunning reflective images. Sense of distance and perspective become skewed as the salty surface goes on mile after endless mile. As the water evaporated the salt crystalised and formed a crust, which is up to 10 m thick in some places. There are tours that run directly from the Chilean town of San Pedro de Atacama, which is close to the Bolivian border. When you are Exploring Salar de Uyuni on a multi-day tour, chances are that you will be visiting this nearby reserve. When these ancient bodies of water evaporated due to time they left behind a thick crust of salt and other minerals and this is what we now call Salar de Uyuni. This spectacular salt flat that covers an area of 10,000 square kilometers is not only the largest in the world, but also one of the most astounding natural marvels in the earth. No special permission is required to enter the Uyuni salt flats. Towel and toiletries – these are not provided in standard tour salt hotels and refuges.- If travelling to Uyuni by bus you will arrive early in the morning (around 6 or 7 am) and most tours begin at around 10 am, giving you time to scout around for a tour you like.
- Unfortunately, standard 2-day tours don’t include these highlights.
- Warm clothes – the altitude is high, and it gets quite cold at night, and below zero in winter months (June to August).
- The fields of salt, extending as far as the eye can see and backed by distant mountains, create one of the most dramatic and unique vistas on Earth.
- A multi-day Salar de Uyuni tour is essentially a tour of the reserve.
- Uyuni itself offers little of interest and so it’s best to avoid spending more time here than necessary.
• Dry Season (May to November):
Salar de Uyuni spreads over 10,582 km2, which is roughly 100 times the size of the Bonneville Salt Flats in the United States. The youngest prehistoric lake was Coipasa, which was radiocarbon dated to 11,500 to 13,400 years ago. Some 30,000 to 42,000 years ago, the area was part of a giant prehistoric lake, Lake Minchin. On our first tour in 2017, although it wasn’t windy at all, the lake had a greenish spinmaya no deposit bonus code tint. In the morning, when most tours come to Laguna, you won’t see the emerald green color. Laguna Colorada, or the Red Lagoon, is a shallow salt lake home to thousands of flamingos. I don’t think this stop was included in tours eight years ago. Another salt flat close to the Chilean border, Salar de Chiguana is a little sister of Salar de Uyuni.Incahuasi Island
Its unusual shape was formed over time by strong winds eroding the sandstone. They appear as small, pinkish spots in the photo below. On our 2025 tour, the sunset was included in the itinerary, and we had wine and snacks while watching the sunset. There are usually fewer tourists and no entry fee. The island is full of giant cacti, it’s awesome seeing them up close.- Lisa is a writer and traveller who left her nine-to-five in London for life on the road.
- Solar de Manaña geysers are located at an altitude of more than 15,912 ft/ 4,850m.
- If you’re only interested in seeing the salt flat itself and snapping some awesome perspective photos, then the one-day option may be for you.
- The Dakar monument is made of salt, and the flags were left by travelers during their visits.
- A mesmerising and dazzling landscape, this vast salt plain is like nowhere else in the world!
- Bolivia has gone an extra mile to introduce international tourists into the country through making the visa process extremely easy in most countries.