Area with many salt piles, weighing approximately a ton each, which are left there to dry.
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A salt processing village, 7 km north of Uyuni. Lots of salt souvenirs available for purchase, and there's a small museum of salt statues.
The famous lot of old wrecked steam locomotives.
Near world's second largest silver mine, at this historical site there's the Bolivia's first railway and a train robbed by Butch Cassidy and the Sundance Kid.
Isla Incahuasi, "fish island"
The "island" of fossilized coral, covered in ancient cacti that grow only a centimeter a year. It's not an island in the strictest sense, just a big rock sticking up out of the otherwise flat ground, but the salt near the edge of it looks strikingly like water coming up to the shore. The island has a hiking trail to the top, for truly surreal views of the salar. It also has a restaurant, and lunch is eaten by most tour groups on the western "shore" of this island. There are well-maintained washrooms.
A dormant volcano that some longer tours allow you to hike up. At some times of year you can see flamingos eating microorganisms at the foot of the volcano.
A town nearby the homonymous mine, one of the largest mine facilities in Bolivia. The town used to be near the mine, but was completely moved to this area. There was a 350-year-old church in the city; it was not destroyed, but instead transported and rebuilt stone-by-stone at the new spot, including the cemetery. The altar within is made of silver, likely because the mine is 3rd largest silver producer of the world.