Another interesting thins in the Plaza de las Banderas flag display is an old abandoned hotel called the Hotel de Sal Playa Blanca. Unlike other hotels located at the edge of the Uyuni Salt Flats, this hotel was literally located right in the middle of nowhere in the all white salt flat. The tour guide said the hotel was closed not because lack of customers, but because of environmental issue primarily due to problem with toilets. The hotel ruin is now used as the only indoor rest area in the vast Uyuni Salt Flats. Of course, there are vendors who sell souvenirs and drinks, etc. Again the hotel seems to be built entirely with block of raw salt crusts.