Salar de Uyuni is a magical place: When covered by water, the world's largest salt flat becomes a mirror, and anyone walking across it appears to be walking on clouds. The salt crust covers 10 583 square kilometres in southwestern Bolivia
This is high up on my list:: World's largest salt flat located at Salar de Uyuni, Bolivia. During the rainy season, the water turns into the world's largest mirror. It's called the border between heaven and earth.