4. Salar de Uyuni, Bolivia
Salt flats are another unique natural feature you don’t see very often. There are certain spots on the Earth with these salt-encrusted flat areas, and the ones in Bolivia are actually among the largest in the world.
But salt flats are more special than one would think; they are a landmark for breathtaking optical illusions. While these areas are covered in a blanket of white salt for most of the year, once in a while water from nearby lakes runs over, and the result is spectacular. The thin layer of water turns the ground of the Salar de Uyuni into a perfectly clear mirror that reflects the sky.
If you visit the Bolivian salt flat during this time, you’ll see that the optical illusion makes it appear as if you’re walking with the sky both underneath your feet and above your head.
