This is the world's largest salt flat.
The Salar de Uyuni is a about 4,000 square miles of land covered in a salt crust.
It is located in the country of Bolivia in South America.
High up in the Andes mountains, this salt flat was formed from prehistoric lakes changing over time.
The Salar de Uyuni is a major tourist attraction for people from all over the world.Many people stay in local hotels that have been built almost entirely out of giant salt blocks.
There is no other place like this on Earth!