Before planning anything else, you need to decide what time of year you want to visit the Bolivian salt flats. The natural wonder changes drastically depending on the season, so you should choose carefully depending on your preferences.
The Bolivian Altiplano has two seasons: wet and dry. The rainy season goes from December to the end of March and is maybe the most popular time to visit. As the rain pours down, nearby lakes overflow and slightly flood the salt flats. Because the water has no natural drainage and because the land is so flat, the Salar turns into a gigantic mirror that reflects the infinite horizon. The beauty of the effect is beyond description. During the day, you feel as if you’re walking inside clouds, and at night, the sky spills into the Earth.
The experience is magical, but nothing beautiful comes easily. The rainy season is also, well, rainy. You might have to tour around the area in the rain, and you’ll walk around the area flooded. There is also a greater chance of your 4WD vehicle (the only way to tour the flats) getting stuck in the mud. Still, if you don’t mind a little inconvenience and are willing to plan for wet feet, the visuals make up for any problem.
Alternatively, you can visit during the dry season, which is from April to November. At this time, the landscape is completely dry, and the salt forms cracked hexagons that expand as far as the eye can see. This season is perfect for getting some fun optical-illusion pictures, taking advantage of the flatness of the land to play around with perspective. One of the biggest selling points of the dry season is the ability to ride a bike through the salt flats and experience the landscape in a more intimate way.
The main downside of the dry season is the temperature, which can drop to around 20 degrees Fahrenheit at night. Keep in mind that you most likely won’t have access to indoor heating in your accommodation, given how remote the salt flats are. Plan accordingly by bringing proper clothes and a sleeping bag.
If you believe that Lady Luck favors you and can’t decide between the two experiences, you can always visit in the transition periods between seasons, which usually are late March or late November. There is a chance — though no guarantee — that some of the areas of the salt flat will be flooded and some will be dry.