A 17 m deep pit. It begins with a small drop of a metre and a half that leads us to a gallery where we advance stooping. We turn right while descending a drop to continue towards a small chamber (section A-B) where we will observe a hole in the ground through which we will crawl (section a-b); the passage descends until it leads us onto a gallery about 3 metres high, which is the widest stretch of the cavity (section C-D). We must descend gently towards the S until we find another narrow passage on our left that leads to another small chamber (section c-d). From this small chamber one can continue through a very narrow little pit which, in the form of a ramp, descends to the level – 17 where a short gallery is observed that leads to an ascending passage that communicates again with the aforementioned ramp through two very narrow little holes.