There's a Hotel in Bolivia Made Entirely of Salt

On the edge of the world's largest salt flat, the Salar de Uyuni, local ingenuity has transformed an abundant mineral into a unique form of architecture. This otherworldly landscape is the remnant of a vast prehistoric lake that evaporated millennia ago, leaving behind a thick crust of salt stretching over 4,000 square miles. Instead of importing conventional building materials across this remote, high-altitude desert, builders looked to the ground beneath their feet. The result is the Palacio de Sal, or "Salt Palace," a hotel constructed almost entirely from this natural resource.

The construction process is both simple and ingenious. Workers cut large, heavy blocks of salt directly from the salt crust, which can be several meters thick. These blocks are then used like bricks, cemented together with a brine mortar that hardens as it dries, fusing the structure into a solid, crystalline whole. Inside the hotel, the theme continues with impressive detail. Not only are the walls, floors, and ceilings made of compressed salt, but so is much of the furniture, including the beds, tables, and chairs.

Living in a salt structure presents unique challenges. The hotel requires constant maintenance, especially during the rainy season when moisture can weaken the walls. This is also why there is a strict house rule asking guests not to lick the walls. While seemingly a quirky request, it serves a practical purpose: to prevent the slow degradation of the building. The rule highlights the delicate balance between tourism and the preservation of this remarkable architectural feat.