9. Salar de Uyuni, Bolivia
A magnet for travellers with a knack for smartphone photography, Bolivia’s Salar de Uyuni
are the largest and most entrancing salt flats on the planet. They are also sitting on half of the world’s lithium reserves, which are now being extracted by the Bolivian government. As the demand for lithium batteries (the ones, incidentally, used in smartphones) increases, Bolivia’s untouched salt flats may soon become the stuff of legend.