In order to build the pyramid here, the ancients traveled to the distant mountains that ring the site to calculate its positioning. Markings were found in these sites as well. Their precision was awesome.
The resessed courtyard at the base of the pyramid may have been flooded and used as a water mirror to study the stars without craning one´s neck.
The steps are terribly steep and shallow. Some say it was to facilitate the rolling of heads (literally). But also, this construction forces you to climb the steps sideways and with your head down, a position of reverence to the gods.