The cavity has a route of 555 m, of which 215 m are completely flooded. The highest point of the cavity is at +25 m from the entrance.

The spring is the main water supply of the Torrent de Rus. The active course of the river comes from the third sump through narrow conduits, and is found again at the start of the second sump. In times of great water circulation, the active course appears through a narrow conduit in the floor of the chamber and soon becomes flooded.

To reach the entrance of the cavity, a first waterfall about 4 m high must first be overcome, with a short scramble and a traverse, which was equipped with rope and a handline. The handline leaves us at a hanging pothole; once crossed, we find an ascending passage that is a little narrow, “el Parrús”, where if the spring is very loaded with water as in the thaw season, it makes entry completely impracticable.

Having climbed “el Parrús” we reach a small chamber, and immediately begin to climb small steps, small waterfalls and some potholes until reaching the first sump, from here on we must continue with cave-diving equipment.

The first sump has a route of 70 m and a maximum depth of -4 m; near its start there is an air chamber that we pass underneath. Once this sump is passed, we find a short gallery of 20 m that soon leaves us at the entrance of the second sump; this also has a length of 70 m and a maximum depth of 11 m. About 20 m from the start of the sump we find a fork to the left, from where the active course of the river comes, which through narrow conduits carries the water from the third sump; however, we must leave this fork and continue along the main conduit, without water current, until the depth of -11 m where a wall bars our way; here we must ascend through a narrow chimney, where a lot of sediment accumulates which makes the water quite muddy. Once this vertical chimney is climbed we come out to the surface in a gallery with an ascending ramp.

Here we must take off the cylinders and diving equipment, and climb a ramp of about 15 m of route and 8 m of drop, where a zip line was installed so that the transport of the cylinders and diving equipment would not be so arduous.

Once this ramp is passed, a comfortable horizontal gallery appears that after about 30 m of route leaves us at the head of a 7 m pit, equipped with rope, at the bottom of which we find the entrance of the third sump. Right at the start of this (S3 25 m / -3 m) we find on the left a narrow conduit through which the active course disappears downstream, which as we have mentioned we find again at the start of the second sump.

Once this short third sump is crossed, we continue upstream for another 30 m and we find the fourth sump (S4 20 m / -2.5 m); after passing it a long pool leaves us at the foot of a 1.5 m step that places us at the entrance of the fifth sump (S5 10 m / -1.5 m); after passing it, a short ramp leads us to a comfortable chamber.

Here different continuations appear: on the left a descending ramp leaves us at the entrance of an inactive sump (S7) and with a lot of sediment and mud that makes visibility become totally nil as soon as a foot is put in the water.

Returning to the previous chamber, in times of great water circulation we observe that the active course appears through a narrow conduit in the floor of the chamber and that it soon becomes flooded.

If from the chamber we continue forward the gallery begins to descend among blocks and leaves us at the entrance of the sixth sump (S6 20 m / -3 m); this, depending on the time of year, presents quite variable levels. Once passed we access a short ascending gallery that places us at the highest point of the cavity at +25 m from the entrance, in an eighth sump, very narrow and that for the moment marks the final point of the cavity.