An curved arrow pointing right. At a staggering 4,086 square miles, Bolivia's Salar de Uyuni is the biggest salt flat in the world. During the rainy season, it essentially turns into a giant mirror.

In southwest Bolivia, the world’s largest salt flats sit atop a vast pool of ... Colors—sea-foam green, mauve, pink, red, brown and black—have a special cachet (although Kurlansky states ...