Descend into a mysterious world at El Castillo Cave. There's something fascinating to see at almost every turn in this subterranean landscape.
This natural underground attraction is in Puente Viesgo, a destination that has lots going for it! Church of San Miguel, Las Monedas Caves, and Hornos de La Pena Cave are other fine sightseeing choices nearby when you're done at El Castillo Cave.