The Mayan Ruins, El Castillo

I think that is so interesting that the Mayan ruins, El Castillo (137), and the phenomenon of the appearance of a snake slithering down the north side of the west staircase are connected to the spring and fall equinoxes and solstices. Architecture, astronomy and religion have always been intertwined and so much of early civilizations belief systems were based on astrological occurrences and how they interpreted the skies. The four sides of the structure have 91 steps, which, when added to the top structure equals to 365, the number of days in a calendar year.