The Uyuni Salt Flat, located in the southwestern part of Bolivia, was once an inland sea and a huge saltwater lake. But now, this saltwater lake has vanished into the dry air of the Andes Plateau, and the only thing left is this layer of salt, dozens of meters thick. At the first sight of this, what popped up in my mind were actually the scenes when I used to do tasks with my roommates on the Flash Plains.