Ten of the most unusual hotels worldwide

9. Hotel Palacio de Sal, Bolivia

Built totally out of salt, the Hotel Palacio de Sal reflected its name. Along with the wells, statues, and ceilings, these enormous salt bricks were utilized to create the beds and other furnishings in the structure. At the sodium-themed hotel, which is situated at 12,000 feet, you have access to both a fine-dining restaurant and a full-service spa.