Walking underground, one of the unique experiences that you can live with this tour, have the unique opportunity to visit one of the most spectacular mining caves of Cantabria, the soplao, one of the old coal mines that opens its doors to show its incredible natural spectacles formed underground, you can feel a unique sensation to see the different rock formations that create the wonderful natural landscape, in addition to listen to its history with one of the guides specialized in this area. Definitely an experience that should not be missed on your visit to Cantabria.