The Uyuni Salt Flats are quite rightly Bolivia’s piece de resistance. A trip from Uyuni to San Pedro de Atacama in Chile takes 3 or 4 nights overland in a 4x4. Accommodation is in simple refuges and a hotel made out of salt (yes, really) but the incredible scenery as you drive for hours over a lake of solid salt past coloured lagoons, snow-capped volcanoes, hot springs and geysers, makes this one of the most spectacular trips in the world.