Cabaña Veronica at the top of the Picos de Europa, Spain.
In 1961, two members of a Cantabrian climbing club, Conrado Sentíes (an engineer) and Luis Pueyo (an architect) spotted an American aircraft carrier, the USS Palau in the Basque port of Santurtzi, waiting to be scrapped. They thought one of the domes would make an excellent mountain refuge and transported it piece by piece, on the back of a horse named Rubio, to its final position 2,325m high at the foot of the Pico Treasurer.