Monoliths and petroglyphs carved by the Taínos can be seen among the rocks and stones, some weighing over a ton, that were most likely brought from the Tanama River located adjacent to the site.

[7] The site also contains the largest concentration of petroglyphs in the Antilles,[8] most of which around found carved into the stone monoliths that form the bateyes or ball courts.

Some of the most famous pictographs include a heron-like bird and atabeyra, also known as the "Caguana woman",[8] attributed to the fertility zemi or goddess Atabey.

The site has been under continuous study since the 1930s, at first by archaeologists from Yale University such as Irvin Rouse, and later by the Institute of Puerto Rican Culture (ICP) and Dr. Ricardo Alegría.

The ICP acquired the site in 1965 and invested in the restoration of its archaeological resources and on interpretative infrastructure for visitors.