When it dried, it left behind two modern lakes, Poopó and Uru Uru, and two major salt deserts, Salar de Coipasa and the larger Salar de Uyuni. Uyuni originates from the Aymara language and means a pen (enclosure); Uyuni is also the name of a town that serves as a gateway for tourists visiting the Salar. The large area, clear skies, and exceptional flatness of the surface make the Salar ideal for calibrating the altimeters of Earth observation satellites. The Salar was formed as a result of transformations of seven Late Pleistocene lakes whose progressive desiccation led to the accumulation of extensive evaporitic salt deposits.
Salar de Uyuni is by far the jewel of South America to those travelers who want awe-inspiring beauty and mystery and to have an adventure that they will remember. On its shores are saltworks at Salinas de Garci Mendoza on the north, Llica on the northwest, and Calcha on the south. I only recommend services I’ve either personally used, thoroughly researched, or consider reliable based on reputation and reviews. This is the most popular itinerary and absolutely worth your time and money. Toys, bottles, etc, to take fun perspective photos. Drinking water and drinks are more expensive than in the town of 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.
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.

Salar de Uyuni Tours Starting Points

• The best time to visit Salar de Uyuni depends on what you want to see.
• (There are no day buses for some reason.) Local buses can be booked on busbud.com.
• In February 2024, the Copernicus Sentinel-3B mission conducted calibration activities over the salar for its Synthetic Aperture Radar Altimeter (SRAL).
• But in the wet season, a thin layer of water transforms the surface into the world’s largest mirror, reflecting the blue altiplano sky and the clouds.
• There are usually fewer tourists and no entry fee.
• The tour takes you through elevations ranging from about 3,600 m to 4,800 m.

Now one of the key stops on Salar de Uyuni tours, it’s become something of a tourist trap. The area was once covered by a huge saltwater lake, which dried up some 30,000–40,000 years ago. The focal point of any Salar de Uyuni tour is, of course, the world’s largest salt flat. Known locally as Salar de Uyuni, the salt flats are part of the Altiplano, a vast plateau that extends for 965 km from southern Peru to the southwestern corner of Bolivia. As the largest salt flat on Earth, the Salar de Uyuni is widely regarded as one of the most effective natural calibration sites for Earth-observing satellites. Multiple fatal incidents have occurred at the salt flat as a result of poorly maintained vehicles, untrained drivers, speeding, a disregard for the inhospitable conditions, and lack of regulation for tour companies.
The best time to see the mirror effect at Salar de Uyuni is during the wet season, which is from December to March. Take altitude seriously, and make sure you acclimatize properly before a tour to fully enjoy the beauty of Salar de Uyuni. If you want to have a chance to see the beautiful mirror effect, you should visit in the wet season, which is from December to March. The best time to visit Salar de Uyuni depends on what you want to see. During the dry season, a thick crust of salt, covered with polygonal patterns, stretches to the horizon.

Main Timer setup

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.
Salar de Uyuni is the largest salt flat in the world, with an area of approximately 10,582 square kilometres (4,086 mi2). Sustainability has gained a critical concern as an increasing number of tourists head to Salar de Uyuni. When you are travelling to other neighbouring countries such as Chile or Peru, over land routes via San Pedro de Atacama and Puno are equally beautiful scenic routes as you go. The vast majority of the visitors arrive at Salar de Uyuni through the Bolivian capital, La Paz. According to many travelers it is one of the most intense stargazing moments of their existence.
On our first tour in 2017, although it wasn’t windy at all, the lake had a greenish 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.

• Some 30,000 to 42,000 years ago, the area was part of a giant prehistoric lake, Lake Minchin.
• Salar de Uyuni is by far the jewel of South America to those travelers who want awe-inspiring beauty and mystery and to have an adventure that they will remember.
• What we see today as a white desert is the long-term memory of ancient lakes, evaporation cycles, mineral precipitation, and climate shifts.
• If you’d like to explore further afield and get out into the surrounding landscape then opt for a two- or three-day tour.
• This travel guide covers what to do, how to get there, where to stay, and useful tips from our experience.
• The crust serves as a source of salt and covers a pool of brine, which is exceptionally rich in lithium.

It’s basically a natural self-leveling surface. Over time, as climate changed, these lakes expanded during wet periods and shrank dramatically during dry ones. For photographers, scientists, engineers, spinmaya no deposit bonus code and travelers, Salar de Uyuni is a place where nature behaves almost unreal. What we see today as a white desert is the long-term memory of ancient lakes, evaporation cycles, mineral precipitation, and climate shifts. Today, she spends her time solo backpacking, navigating through life and unfamiliar streets.
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.

Isla Incahuasi (Cactus Island)

Solar de Manaña geysers are located at an altitude of more than 15,912 ft/ 4,850m. Make sure to charge your devices during this time. Note that to enter Reserva Nacional de Fauna Andina Eduardo Avaroa, you need to pay an entrance fee of Bs 150 (not included in the tour price). In reality, its deep red color comes from red sediments and the pigments of algae and microorganisms living in the lake. According to the local folklore, the water in Laguna Colorada is the blood of the Gods. It sits at an altitude of 14,000 ft/ 4,270 m in Eduardo Avaroa Andean Fauna National Reserve, close to the Chilean border.
This has direct consequences for lithium extraction, tourism pressure, and local ecosystems. The Salar’s visual magic is not random—it’s atmospheric physics. So the famous mirror effect is not just pretty—it’s physics, geology, and climate working together.
I am not a fan of commercial tours and wanted to experience Salar de Uyuni independently. South America has stunning salt flats, but Salar de Uyuni is the world’s largest at about 4,674 sq mi (12,106 sq km). Be sure to check out the Dakar Rally monument located in Colchani, right at the edge of the salt flats.
Some people decide to skip Isla Incahuasi and just walk around it to save 30 Bs, but I think it’s money well spent. There’s a short walk to the top of the island, and the entry fee is 30 Bs (not included in the tour price). Except for two cacti-filled islands, Salar de Uyuni is completely flat, creating an endless horizon perfect for fun perspective shots. Salar de Uyuni is a paradise for photographers. This is the area where salt is dug up, piled into large pyramid-shaped mounds, and left to dry in the sun.

Time

However, if you are travelling from La Paz (which is at a similar altitude) or Cusco (just 250 m lower) then you will likely be fine as you should have acclimatised. For private tours expect to pay significantly more. These are shared tours with usually five or six people per jeep.

The majority of travellers begin their Salar de Uyuni tour from Uyuni itself. Here are some of the key differences between the plethora of tours on offer. A multi-day Salar de Uyuni tour is essentially a tour of the reserve. In these hotels everything, from the walls and floors to the beds and tables, is constructed from salt!
In Colchani, there are several hostels, a couple of salt museums, and a souvenir market where all tours stop by. It’s a good way to explore Uyuni salt flats as long as you don’t plan to cycle further to the altiplano. We saw a couple of people cycling on the Uyuni salt flats.

Our new bookable trips

Make sure you know what the weather will be like before you book a tour and therefore what the landscape will look like. Also make sure you know exactly what the tour you are booking includes in terms of duration, accommodation options, guide and itinerary. Even if you decide to book a tour on arrival in Uyuni, try to do a little research on the company you choose and check reviews. You’ll need a warm sleeping bag (tour companies provide these, often at an additional charge), and don’t forget to pack warm clothing. Daytime can often feel pleasantly warm in the sun, but after it sets temperatures can easily plummet to around -10°C. If you’re booking a budget tour, expect there to be an additional cost.