Piedra Santa is a large rock outcrop near Malalcahuello in AraucanÃÂa Region, Chile. It is best known for folklore and folk Catholicism associated to it. Piedra Santa is said to be a Mapuche princess, and the daughter of great warrior, turned into rock. People who travel between CuracautÃÂn and Lonquimay stop at Piedra Santa to deposit food and other gifts in order to "feed" the princess.