The Castillejo is a 13th-century Almohad fortified village made from rubblework masonry and rammed earth. Its main entrance has two bends, with a U-shaped room that played a defensive role. A main street divides the town into two parts. On the left side there were a number of houses, each with a central courtyard and rooms arranged around it. On the right side some of the houses had inside staircases.
The study of the pottery fragments has provided enough information about the local population who worked in agriculture, animal husbandry and silk. In the 16th century El Castillejo was occupied by Moors, who turned the site into a mosque.