Salar de Uyuni, Bolivia These 4,086 square miles in southwest Bolivia make up the world’s largest salt flat. The vast and incredibly flat plains and clear skies of Salar de Uyuni make it both one of the most famous “natural mirrors” on the planet, as well as an ideal altimeter calibration site for Earth observation satellites. 31 of 75 of the most colorful places in the world to go to.
