It is one of the largest pools in the Collsacabra, with a width of 70 m, although it is not very deep, it has a maximum of 7 m. The maximum height is 4 m.
Inside there are two large rectangular sinks (one simple and one double) dug into the rock that collect the water that falls from the roof of the balma.
It was possibly the primitive house of the Baumes, located well below. It could also have been the refuge of the famous Serrallonga, since according to a legend, he used to rest in a balma near Tavertet that had room for 60 men and beasts of burden. It is a balm, that of Spades, which meets these conditions, due to its capacity and strategy.