First documented and excavated in 1928 by Gregory Mason, the Rio Frio Caves were among the earliest studied caverns in Belize. He called the three caves A, B, and C, although today they are known locally as “Twin Cave,” and Rio Frio Cave respectively. In his study, Mason noted several architectural features including an altar, walls, and a zoomorphic cave formation that baffled him because he believed it was made by the ancient Maya. Working under what was later termed a paleolithic paradigm, he believed that past people were living in the caves and that the architecture was primarily defensive in nature used to keep debris from tumbling down into the caverns and to hide and protect the inhabitants from invaders. In 2018, I began the Rio Frio Regional Archaeological Project (RiFRAP), the second ever study the Rio Frio caves. Combining traditional archaeology with an array of emerging technology, my team and I have been excavating and digitally documenting the caverns. In this talk, I will present a multimedia virtual walking tour of two of the largest Rio Frio caverns, Caves A and C. Along the way, we’ll revisit the architectural constructions Mason discussed, reevaluate his conclusions about habitation and the nature of the “constructed” formation, and learn more about the RiFRAP’s ongoing investigations.