Chichen Itza is the largest of the ruined Mayan cities on the Yucatan Peninsula. After Teotihuacan, it is the second most visited archaeological site in Mexico
The pyramids are around 1500 years old and are believed to have served as a calendar. The pyramids, in total, have 365 steps, one step for each day of the year.
The main attraction is the central pyramid, or el Castillo, which served as a temple to the God Kukulkan (also known as Quetzalcoatl to the Aztecs). Near the pyramids is a ball court where the ancient Maya played a sport similar to basketball. There was an ancient Maya prophecy that on December 22, 2012, Kukulkan would rise from beneath the ball court and bring the world to an end. Of course, that prophecy never came to be.