Near to the main square is the great ball court, one of thirteen such structures on the site, but an impressive structure in its own right, flanked by the Temple of the Jaguar and the Temple of the Bearded Man. You can see the "goals" in the walls, at a very high level above the ground making you wonder as to the complex rules of such a sport.
The skull carvings on the Skull Platform (Tzompantli) are an appropriate reminder of the frequent human sacrifices that took place during the Mayan era, evidence of which can be found at the bottom of the 60m wide Cenote Sagrada, where along with gems, pottery, wood and cloth were the skeletons of men and children.
Beautifully decorated buildings, the impressive complex known as the Group of a Thousand Columns, and the El Caracol Observatory all provide testament to the Mayans engineering, learning, arts and culture. I think I love the connection to the jaguar the most!