The main purpose of UNESCO World Heritage Convention is to identify the universal cultural and natural values in the world. Chichen-Itza is one of the best examples of a universal cultural value.
The most important reasons for being World Heritage Site:
1. Although the city was established between 415-435 AD and although no major monuments were added after the 13th century, Chichen Itza monuments are unquestionably accepted as the masterpieces of Mesoamerican architecture.
2. These masterpieces had been examples and influences for other monuments that were built in Yucatan from 10th to 15th century.
3. It’s the most important relic of Mayans in Yucatan.