Tags for this video have been changed from 'MAMON quetzalcoatl trump' to 'MAMON, quetzalcoatl, trump, Ale Damiani' - edited by eric3579

It means Quetzalcoatl has returned!

I spent a summer living in Merida so I've been there a number of times. On the Spring and Autumn equinox, at the rising and setting of the sun, the corner of the structure casts a shadow in the shape of a plumed serpent - Kukulcan, or Quetzalcoatl - along the west side of the north staircase. On these two days, the shadows from the corner tiers slither down the northern side of the pyramid with the sun's movement to the serpent's head at the base. There are also 91 steps on each side and then the one platform at the top to account for the 365 days of the year (the fact that they knew this in the ~11th century is damn impressive).

They also built this 30 meter-tall pyramid without any load bearing animals, metal tools, pulleys, or the wheel.