Pyramid of Kukulcan, Chichen-Itza (it is both a solar and a lunar calendar). Built in the late Mayan period, around 1200 AD.

Wide-eyed travelers on the bus ride At the entrance to a new wonder of the world 91 steps on each side plus the base add up to 365!
Dedicated to the plumed serpent God Quetzlcoatl (Kukulcan) The wonder. Mayan handicrafts on display.
The Cenote or sink-hole where human sacrifices were made The ball-court inscriptions show soccer games. Players had to pass a ball through the ring without using their hands. The losing team was sacrificed.

Video: One of the new seven wonders of the world, the pyramid of Kukulcan in Chichen-Itza, Mexico.