A visit to Cancun would be remiss without visiting the ruins of Chichen Itza.
One of the most breathtaking ruins in the Mayan world. The Mayan Ballpark and the Temple of Warriors provides a view of a very modern world that has long since been forgotten.
This Mayan city was founded around 800 AD and is the best restored Mayan site in the Yucatan Peninsula.
So in Cancun, it's not just running in an Ironman 70.3, it's enjoying, relaxing and learning about the history and culture -- and that together is more important than completing the triathlon