El Tajín
Totonac ceremonial city on Mexico's Gulf coast, centred on the Pyramid of the Niches - 365 rectangular niches, one for each day of the solar year, arranged with such geometric precision that the building functions as an astronomical calendar at the equinoxes.
Dated events and their evidence
Where
20.4481° N, 97.3782° W
Sources
Each event carries Aion's own evidence grade (mainstream, disputed or speculative). This page repeats what the globe shows for this place.