Refugi/Cabana de Siscaro. This unmanned structure in the Pyrenees is where hikers on Andorran section of the HRP passes by. I think it can sleep about 14 people.
It has an interesting placement next to a wetland, it is best approached from the signpost on the approach from Valls de Incles (west-to-east direction on the HRP). If approached from the other direction it can be tempting to cross the wetland, but unless you know where you are going, you might be forced to turn back.