Grallera Gran de Cornellana

A depression at the Prat Nabiral gives way to a 25 metre deep shaft, divided into a first small pit of -12.30 that leaves us on a ledge full of chough excrement and with some nests of these birds on the walls. From this point a steep ramp gives access to the second section of the shaft, which has a depth of -9 metres.

Having descended this shaft, we find a ramp also full of excrement and small blocks. In a Westerly direction we find a small hollow where water sometimes accumulates. In a SE direction we find a gallery of about 8 metres, with a very low ceiling, which ends blocked by debris. To the NE we find an interesting shaft of -9 metres depth and about 4 metres in diameter.

In front we see a window that gives onto the base of a shaft. Having descended the aforementioned P-9 and passing beside a large precariously wedged block, we reach the base of a shaft where the floor is formed of large blocks. The chamber is 5X2 metres; if we go towards the North, we will see a small window through which, by an ascending crawl, one reaches the base of a shaft. This one could not be accessed due to its narrowness. On the floor we observe a small pit between blocks (P-3.60) that leads us to a lower chamber, formed beneath the aforementioned blocks and with no apparent continuation. Here the maximum drop of the Grallera occurs: -41.50 metres.

In a Westerly direction we find a small hollow where water sometimes accumulates.

A depression at the Prat Nabiral gives way to a 25 metre deep shaft, divided into a first small pit of -12.30 that leaves us on a ledge. From this point a steep ramp gives access to the second section of the shaft, which has a depth of -9 metres. Having descended this shaft, we find a ramp also full of excrement and small blocks. In a SE direction we find a gallery of about 8 metres, with a very low ceiling, which ends blocked by debris. To the NE we find an interesting shaft of -9 metres depth and about 4 metres in diameter. In front we see a window that gives onto the base of a shaft. Having descended the aforementioned P-9 and passing beside a large precariously wedged block, we reach the base of a shaft where the floor is formed of large blocks. The chamber is 5X2 metres; if we go towards the North, we will see a small window through which, by an ascending crawl, one reaches the base of a shaft. This one could not be accessed due to its narrowness. On the floor we observe a small pit between blocks (P-3.60) that leads us to a lower chamber, formed beneath the aforementioned blocks and with no apparent continuation. Here the maximum drop of the Grallera occurs: -41.50 metres.