In the south-western part of Bolivia, near the famous salt flats of Uyuni, a unique hotel Hotel de Sal Playa was built entirely of salt back in 1993. Noting that people who wish to work in the area are often looking for a place to stay overnight and that salt is almost the only material, which is readily available in the region one entrepreneur came up with an idea of this hotel. Quite a successful idea, it has to be said!