For a thousand years, the Mayan people lived and built their civilization from the jungles of Guatemala to the Yucatan Peninsula in Mexico. Many of their buildings remain, and excavation work is still going on. Chichen Itza was one of the most powerful cities of the Mayan civilization, built in the northern region of the Yucatan Peninsula.
We learned so much history of this place that I can't begin to tell it all here. There are many books available if you want to know more. Here is a good place to start.
These Mayans were apparently obsessed with snakes; there are multiple snakes in their carvings.
An estimated 1.2 million visitors come here every year, making it the most visited site in Mexico. I think about half of them were there the same day we were.