We have now arrived a the wide Northern entrance, where a luxurious green area has formed. Here is the point where the river, joined by the Gutturu Farris river, gets inside the cave. At its top there is the entrance of a small passage, where was found a fossilised bone, fossil we still don t know the origins. The pavement inclination here allowed the formation of rimstones, most of them no longer active.
Human activity in this side of the cave is proven since ancient times. We can notice how the stratified layer under the flowstone still keeps burned soil, evidence of huge fires once burning above its grounds. The fire served to both warm up the area and allow the people to live, and as a source of light, to light the torches needed to cross the dark tunnel for the whole length. Bibliographic sources also mention the existence of a chapel, which was likely to be the Saint John’s chapel, which gave the name to the cave. An archaeological excavation in this area could definitely give us interesting information, since none has been done to date.