The diapir of Poza de la Sal Nature · Poza de la Sal, La Bureba, Burgos Image of Poza de la Sal, not of the place itself. The village sits on a circular geological structure of some two and a half kilometres in radius, one of the largest salt diapirs in Europe: the salt that pushed up from the subsoil explains the whole history of the place. Photo: Mario Modesto Mata (CC BY-SA 3.0) What to see and do in Poza de la Sal