The chronology of Chichen Itza continues to be a source of debate, and the hoped-for answers to the mystery of the Classic Maya decline elusive (wholesale "Mexicanisation" by invading forces ruled out by the lack of these indicators in the central and southern sites). However, the Carnegie excavations did add significantly to the corpus of available information, and are notable for their scope alone, if not for fine details and quality of research. The site's reconstruction by Carnegie has proved to be a lasting one, and the site today is among the most visited of pre-Columbian ruins in all of Central America and Mexico, with in excess of a million visitors per year.