Once we get to the east bank of the Vega stream, we will reach the most outstanding place along this route, where the remains of a woolenmill silenced by the passage of time are located. Woolenmills and mills have a very similar structure. In this case, the waterflow coming from the gully of Valdeñigo was responsible for moving the wheel which activated the device. This device is composed by a gearwheel which moves a pair of wood mauls, in order to wash and hit the wool clothes until they got a proper texture. This process is called fulling. A working woolenmill produces a very characteristic sound, creating a sound landscape now lost.
Woolenmills are a vital element to manufacture wool clothes, which was the main manufacture stablished by Juan de Goyeneche in Nuevo Baztán. Sadly, the waterflow from Valdeñigo stream, did not allow to keep the woolenmill working all year round. For this reason, Goyeneche owned some other woolenmills in the banks of the Tajuña river, where the waterflow is as plentiful in summer as in winter. On the other hand, this meant a longer distance between the woolenmill and the workshop, and higher transport costs.