The purpose of these elements was to house the pigs, usually Iberian pigs that grazed among the oaks and had their shelter in these solid constructions. They can be round or square, isolated or several together.

The walls are made of stone and for the roof, a dome is made, also of stone, which is then covered with earth. They have a very small door, just enough for the animal to enter. In front they have a small corral.