An old mining early twentieth century and is today one of the most beautiful caves that can be visited in Spain and a reference of world speleology. In Cantabria, in the Sierra de Arnero, you can walk through a cavity which is especially unique because of the high number of eccentric training or helíctitas (unlike stalactites and stalagmites, no axis).
It was in 1975 when a group of caving Cantabrian was introduced in the then abandoned mining and found a place, who like many others in other fields, has been dubbed as "the Sistine Chapel of the underground world. The truth is that the tour of the cave is impressive. Has a long visit to the public, after taking tons of coal and debris that did not stop to contemplate the natural spectacle, and has even managed to create a space for small concerts. The place is well lit and offers a wide range of amazing formations. Within these, according to their composition and crystallographic, there are calcite and aragonite (a slow-growing and longer and the others are "sculptures" more geometric).
Visitors can tour 1.500 meters, of 17 kilometers consisting galleries of this natural paradise, and play to find appearances entretenser. There's a world of strange rock sculptures among those. The recommendation Soplao VOD is a special and unknown at this place.
To get there you exit 269 of A8 motorway Santander-Oviedo, The Tánagos-Pesués-Puentenansa. Passing Bridge Arrudo deviation Rabago and resort The Soplao.
