The salt lake, the biggest in the world is located to the west of Uyuni and the southeast of Bolivia to a height of 3.700 m.a.s.l. With an extension approximately of 12.000 km². It is said that it has a depth of 120 meters. The first 6 meters is of pure salt and the rest contains among the elements of salt, boron, magnesium, sodium, potassium and other, the element but important it is the lithium considered strategic mineral of world requirement, the quantity of salt is considered in 64.000 million tons.