ARB-13 Pozo Ilardokia

The entrance does not appear to act as an active sink, as it is slightly higher than the streambed. After a small 3-metre scramble down, a small gallery of 3 x 2 is reached, which at 10 metres ends in a large pit of more than 100 metres. At first it is an ellipsoidal corrosion pit measuring 15x5, but it gradually widens until it opens out into a vast clastic chamber about 50 metres high and 700 square metres in area. The presence of large blocks on its floor prevents any continuation.

The cavity does indeed end up collecting the water that has previously filtered through. In the rainy season the pit can be very active, as shown by the traces of fluting that the water has left on its walls.