Built near the year 1100 AD, El Castillo served the Mayas of Xichen Itza as a calendar. With 91 steps per staircase on each of its 4 sides, totaling 364 stairs and the platform on top illustrating the 365th day.
El Castillo - One of the "new" Seven Wonders of the World - Xichen Itza, Yucatan, Mexico
