The peak is completely surrounded by nearly vertical cliffs of a hundred meters of difference except at its eastern end where it presents a narrow gorge through which it joins the Serra de Busa. At this point the cliff must not be much more than ten meters deep. Despite this, it is high enough to require a lever or bridge to access the grinding wheel. Until about fifteen years ago, it consisted of a pair of logs joined by horizontal wooden planks and had no railings. Due to its precarious state, it was replaced by a metal lever by the neighbors of Navès.
The mill is made up of Montserrat conglomerates and is notched by numerous chasms. Of particular note is one located at the south-western end called the Capolatell chasm with a depth of 115 meters, which makes it the second deepest chasm in the region, surpassed only by the Montserrat Ubach chasm.
This very particular morphology led to the fact that during the French war (1808-1814) the Capolatell was used as a prison for soldiers of Napoleon's army, which led to the fact that even today the Capolatell is also known by the name of the Busa Prison
At its western end we find a viewpoint that takes your breath away.