Mexico is the land of the fiesta and the locals will find any reason to party. Whether they're celebrating independence, the saints or the dead, you can expect vibrant colours, lively music and a whole lot of dancing. One to keep an eye out for is the Autumn Equinox, when crowds gather at Chichen Itza to witness the sunlight and shadows play tricks on this ancient relic. During the autumn (and spring) equinox, the sun moves across Chichen Itza, illuminating parts of the temple to reveal the moving body of a snake. Not seen on any other days, this natural spectacle draws thousands of pilgrims.