The entrance, 2.5 by 1 metres, gives way to a 7-metre shaft that is very well eroded. From here several directions can be taken. Climbing a little towards the W, one follows a low gallery that leads to a small chamber from which two branches set off that end after a few metres; in this small chamber there is a hole in the floor that connects with other crawls. Returning to the base of the entrance shaft, one can follow a steep ramp towards the SW, which leads to the top of a shaft. At one end, before descending it, one can follow a gallery that opens into a small chamber. Before that, however, there is a crawl that climbs towards the small chamber of the western galleries. If we descend the shaft we will come out in a large chamber 9 by 6 metres. This can also be reached from the base of the entrance shaft, towards the E, through a crouching passage to a chamber where we find another shaft that opens at the other end of the lower chamber. From here several small passages can be followed and at their W end it will be necessary to progress crawling for a few metres until an enlargement is found. One continues, crouching again, until a large block interrupts the way. At the opposite end we find a small passage a few metres long that ends full of gravel. There is also a third hole on the S side of the chamber; this one, very narrow, connects to a small chamber from which several very narrow passages of little length set off.