Final answer:
The pyramid of Kukulkan at Chichen Itza is based on the Mayan calendar through its design and astronomical alignments.
Step-by-step explanation:
The pyramid of Kukulkan at Chichen Itza is based on the Mayan calendar through both its design and astronomical alignments. The pyramid, also known as El Castillo, has four sides with a total of 365 steps, representing the number of days in a solar year. It also contains several elements that align with astronomical events, such as the equinoxes when the shadow of the pyramid creates the illusion of a serpent descending the steps.
Learn more about Mayan calendar and the pyramid of Kukulkan at Chichen Itza