
Pyramid of Kukulcan (El Castillo)
The site's king monument 24 m high, 365 steps (91 steps per side × 4 + top platform = 1 per day of the Mayan year). On the equinoxes (March/September), the sun draws a serpent descending the north staircase. Climbing the pyramid has been forbidden since 2008 - ground viewing only.










