Monte del Castillo, Puente Viesgo
Access by vehicle: from the centre of the Puente Viesgo municipal district, next to the car park, take the Monte El Castillo road. After about 1.4 km., you come to a car park. From there access is on foot to the Interpretation Centre and to the caves.
Access on foot: from the centre of the Puente Viesgo municipal district, next to the car park, take the PR-S17 footpath. After a 25 minute walk, you reach the Interpretation Centre and the caves.