Nunnery (Las Monjas) Complex, Chichen Itza, Mexico — This elaborate multi-story building misnamed 'the Nunnery' by Spanish conquistadors was actually a government or ceremonial building, its facades encrusted with masks of the rain god Chaac stacked in elaborate patterns. Its Puuc-style carved stone latticework represents an earlier Maya architectural tradition predating the Toltec influence.
© Dennis G. Jarvis, CC BY-SA 2.0, via Wikimedia Commons