A Quechua woman walks along a dessert of salt during a visit to the Rio Grande lithium pilot plant by Bolivia's President Evo Morales, in the Salar de Uyuni, in southern Bolivia, Thursday October 29, 2009. Salar de Uyuni is the world's largest salt flat at 10,582 km² (4,085 square miles) and holds around half the world's reserves of lithium.
Juan Karita/AP
Salar de Uyuni in Bolivia is both the world's largest salt flat (it's about 4,000 square miles) and the home of half the planet's lithium, a key component in most electronics' batteries.
The wet season turns it into a perfectly reflective lake...