El Castillo, Chichen Itza - Credit: Wikimedia Commons
El Castillo (, Spanish for "the castle"), also known as the Temple of Kukulcan is a Mesoamerican step-pyramid that dominates the center of the Chichen Itza archaeological site in the Mexican state of Yucatán. The temple building is more formally designated by archaeologists as Chichen Itza Structure 5B18. Read more on Wikipedia
Source: en.wikipedia.org