Cave of Water, the unknown.
The Water Cave, very close to Castrejón de la Peña. Leaving the village of Traspeña de la Peña and subsequently crossing the La Robla León-Bilbao railway tracks, we ascend the hillside with oak groves, holm oaks, and rocky terrain. Leaving the Vultures' Perch to our left, we walk for a kilometer until we reach the mouth of the cave. The cave is not accessible for visits, although it has two water outlets, one upper and one lower, which invite you to take photographs due to the curious formation.