The shadow of the serpent on the Pyramid of Kukulkán at Chichén Itzá is a famous astronomical and ritual phenomenon tied to the Maya calendar. On the spring and autumn equinoxes, sunlight strikes the pyramid’s northwest staircase in such a way that a series of triangular shadows appear along the balustrade, creating the illusion of a serpent’s body slithering downward. These shadows align with the large stone serpent head carved at the base of the stairs, making it seem as if the feathered serpe

Every year on the spring equinox, Mayan deity Kukulkan announces the beginning of the new season at his temple in Chichen Itza, Mexico... | Discovery