The accuracy of Mayan astrology

two days ago on Mar 21, we were fortunate enough to be here on time to witness the twice a year equinox phenomenon in Dzibilchaltun. The temple here is situated so that every year, on the spring and fall equinox, the sun shines directly through the doorway as it rises. The early morning in the Mayan site feels very different, sacred and spiritual, as the sun rises and sends its beam through the door and some white dressed people (meditating, it was stunningly beautiful. The door was constructed in such accuracy that even taking one step away from the direct line, the sun rise will be out of sight. This is only one example of Mayan´s astrology reflecting on their architecture. Another stunning phenomenon happens on the same day in Chichen Itza, where the sun down casts shadow of a serpent slithering downwards until it joins the head carving at the bottom of the stairway. already stunning by imagination... :)