THE PYRAMID OF KUKULCAN, YUCATAN – MEXICO
The Pyramid of Kukulcan (also known as El Castillo, a name given by the Spanish Conquistadors) is the central pyramid of Chich’en Itza, it was built over a pre-existing temple between 800 and 900 AD. Chich’en Itza is one of the New Seven Wonders of the World, and a UNESCO World Heritage Site.
Information about the solar, Toltec, and Maya calendars is carefully built into el Castillo pyramid. Each stairway has exactly 91 steps, times four is 364 plus the top platform equals 365, the days in the solar calendar.
Pyramid has 52 panels in the nine terraces; 52 is the number of years in the Toltec cycle. Each of the nine terraced steps are divided in two: 18 for the months in the yearly Maya calendar. Most impressively, though, is not the numbers game, but the fact that on the autumnal and vernal equinoxes, the sun shining on the platform edges forms shadows on the balustrades of the north face that look like a writhing rattle snake. There are 18 terraces on each side, the number of months in the Mayan year.
It is the biggest pyramid in Chich’en Itza; at its base 53.3 meters wide on all four sides. It towers above the other monuments at 24 meters tall with a 6-meter temple on top of the highest platform. It was built with limestone.
Height 24 m (79 ft.): without temple
30 m (98 ft.): with temple
Base: 55.3 m (181 ft.)
Slope: 37°29’44” (edges)
(Source : http://www.philipcoppens.com/nap–art3.html)