One the most well known sites is Caguana located in Utuado. Caguana is a ceremonial site consisting of a large central plaza, a ceremonial dance area, 10 rectangular earth-and-stone–lined ball courts and one circular plaza, as well as the remains of an oval-shaped structure and a sacred mound (129)..jpg)
The petroglyphs figures carved into the rectangular stones are known as cemis, deities or ancestral spirits. The sculptural object that houses the spirit is known as a cemi as well.

Another popular petroglyph site is Piedra la Escrita in Jayuya. This site is located in a riverbed. The petroglyphs are carved onto the rocks and consist of many anthropomorphic and zoomorphic designs.