Yo’aktun lies six km southwest of Sacalaca. It has a fairly long cave passage compared to other known caves in the region. The cave is accessed from a small rejollada which has a small nearby haltun, a small water filled cavity. From the rejollada the cave leads down to a series of chambers that are over two m high. The main passageway ends in two deeper chambers. The first one has a small pool of water, but which is considerably larger and deeper during the rainy season. There were only few sherds visible in the cave, but there are also deep guano deposits that possibly cover artifacts.
The site has several surface structures. Northwest of the rejollada are two platforms. Further to the west is a platform built on a natural rise. 350 m west of the cave is a large platform, measuring roughly 100 x 100 m and 4 to 5 m in height. Several other structures are located between this structure and the cave. A test pit was placed in the large platform in order to date the structure. There was a minor Late Formative (300 B.C.-A.D. 250) occupation and it was resettled during the Terminal Classic (800-1100) with three flooring episodes. Yo’aktun appears to have been a striated space in the Late Formative and the Terminal Classic with possible smoothing phases during the Early and Late Classic periods.