Estaquería, a nearby cemetery, may have given clues to show how the bodies were preserved. At Estaquería, archaeologists have found wooden pillars which was first thought to have been used for astronomical sightings. However, it is not thought that those posts were used to dry the bodies. This was a mummification process. This clue helped archaeologists to understand why these thousand-year-old bodies still had their hair and some soft tissue, like skin, still attached to them.