Chichen Itza was an ancient Mayan city located in Mexico that served as an important religious and political center between the years 600-1200 AD. The site features numerous structures including El Castillo, a step pyramid dedicated to the feathered serpent god Kukulcan. Other notable structures are the Great Ball Court, the largest ball court in Mesoamerica used to play an ancient ballgame, and the Cenote Sagrado, a large natural sinkhole that provided the city with its water supply. Chichen Itza demonstrates the advanced astronomical knowledge of the Maya as structures like El Caracol were precisely aligned to mark solar and lunar events.