Introduction to Salar de Uyuni Salar de Uyuni is the world’s largest salt flat, known for its stunning views and unique geology. It covers over 4,000 square miles in Bolivia’s Potosí region.

The Salar de Uyuni desert is famous for its gleaming surface waters and hexagonal salt crust patterns, but below this otherworldly landscape lie about 11 million tons of highly sought-after lithium.