Magnificent cave, a fruit of the natural erosion of the calcareous ground. The cave shows remains of having been used as a natural shelter throughout the centuries. Due to the climatology, it suffered a collapse that that prevents you from entering more than the first stretch. Even so, there are numerous speleologists (cave experts) that have studied it. It was discovered by an Onda neighbour during the deforestation of a forest track. It reaches a depth of -223m.