Next to the access road to the population of Lupiñén, in the direction of the dam of The Sotonera, a peculiar construction made of ashlar masonry can be observed. It has a square plant and it is covered with a false vault. The entrance to the same one is located in the wall placed to the east.

It has the aspect of a igloo. The oldest people of the town say that inside of it the passer-bys of the zone took refuge.