The Mayan pyramid, also known as El Castillo, at the archaeological site of Chichén Itzá served as a temple for the feathered serpent god, Kukulkán. Built between the 9th and 12th centuries A.D., the temple has 365 steps, one for each day of the year. Two serpent heads decorate the bottom of the northern stairway. The late afternnon sun striking off the northwest corner of the pyramid creates an illusion of a serpent crawling down the temple, during the spring and autumn equinoxes. Chichén Itzá is located near the small town of Piste.