Every year on June twenty-fourth, these quiet ruins erupt with color and song during the Inti Raymi, or the Festival of the Sun. This is the most important celebration in the Andean world, marking the winter solstice and the Inca New Year. Hundreds of actors dressed in traditional robes descend upon this great esplanade to honor the Sun God, Inti, and the Pachamama, or Mother Earth. The zigzag walls themselves are thought to represent the lightning deity, Illapa, bridging the gap between the earth and the heavens. If you are visiting on a sunny day, be extremely careful with the ultraviolet radiation; it is significantly stronger at this elevation than at sea level. Be sure to wear a hat and apply sunscreen regularly, even if it feels cool.