Very good photo. And wonderful pyramid. Who was the Kukulca? Interesting: in Polish is word: kukułka. It's sort of birds. Kukułka (read: kukulka) plants eggs to nests of other birds. And it cuckoos in forest.
Kukulkan is interesting... it means ("Plumed Serpent" or "Feathered Serpent") is the name of a Maya snake deity that also serves to designate historical persons/gods. The depiction of the feathered serpent deity is present in other cultures of Mesoamerica like the Aztecs. Here is the true definition from google: "In Yucatán, references to the deity Kukulkan are confused by references to a named individual who bore the name of the god. Because of this, the distinction between the two has become blurred. This individual appears to have been a ruler or priest at Chichen Itza, who first appeared around the 10th century. Although Kukulkan was mentioned as a historical person by Maya writers of the 16th century, the earlier 9th century texts at Chichen Itza never identified him as human and artistic representations depicted him as a Vision Serpent entwined around the figures of nobles. At Chichen Itza, Kukulkan is also depicted presiding over sacrifice scenes."