Leave Potosi behind and travel to the city of Uyuni. This remote town sits on the edge of the high Altiplano – a wilderness area extending for hundreds of kilometres towards the border with Argentina and Chile. Apart from being a gateway to the Salt Flats, Uyuni also happens to sit above one of the world’s largest lithium reserves. While it won’t help you if you’ve arrived with a flat battery, Uyuni’s lithium, once extracted, could potentially power the planet’s smart phones and electric cars for the next century. Enjoy free time on arrival – perhaps take the opportunity to rest up before you kick off your exciting excursion to Salar de Uyuni tomorrow. Tonight’s hotel is fairly basic, but it’s clean, comfortable and has hot water. As you’ll be heading out into the desert over the next few days with limited amenities, make the most of the facilities.