Geographical location :
Salar de Uyuni - " Largest mirror in the world "
Salar de Uyuni is the world's largest salt flatland at 10,582 square kilometers . It is located in Daniel campos Province in Potosi in southwest Bolivia.
Every year, this amazing wonderland in southwest Bolivia covers with a thin layer of water. When that happens, it turns into the largest mirror on the planet .It is so big that you can see it from space.
Salar de Uyuni is the result of thousands of years of transformations that took place between several prehistoric lakes. The land is covered with a few meters-worth of salt brine that creates a stunningly flat surface.
Source : https://gizmodo.com/5929711/the-largest-mirror-in-the-world-is-also-one-of-the-most-beautiful-places-on-earth
https://en.wikipedia.org/wiki/Salar_de_Uyuni