In the florescence of Puuc architecture (such as at the ancient Maya site of Uxmal) buildings were decorated with carefully cut veneer stones set into a concrete core.
Long-nosed masks (commonly believed to be of the Maya rain god Chaac) are found on many Puuc buildings.
The transition from earlier Classic Period architecture to Puuc style core-veneer masonry is well documented at the site of Oxkintok.
To the south, the style can be found in Edzná; and to the east at Chichen Itza (outside of the Puuc Hills region).
The recently completed Chunhuaymil project compiled data of the remaining Puuc architecture of 19 archaeological sites located in a 100 square kilometers area.