History and caving in Cantabria

The Eastern Shore Cantabria covers from Somo, facing the bay of Santander, to the municipality of Castro Urdiales, on the border with Biscay. In this area, its beautiful landscapes such as Cabo de Ajo, the cliffs of Langre, the estuary of Treto, Cabo Quejo, the bay of Santoña, Oriñón and Ontón are surprising; the beautiful and extensive beaches of Noja and Laredo, and the valleys of Liendo and Guriezo. Thanks to the large tourist influx and the development of some industries, it has become the most densely populated area in the entire region.

The towns of Santoña, Colindres and Laredo have an important fishing fleet and they concentrate salting crafts in their factories, as well as preserving anchovy and bonito, products of great prestige. The delicate clams from Pedreña and the excellent lobsters from Isla can be tasted in taverns and restaurants near the ports.


48 kilometers from Santander is this municipality, especially recognized for its marshes of great ecological value and natural reserve. They have an extension of 6,678 hectares and cover part of the municipalities of Noja, Limpias and Colindres. They also constitute a unique enclave for the richness of its marine fauna and for being a crossing point for migratory birds.

Historically, the first signs of population date from the Superior paleolithic, as can be seen from the utensils and rock art found in the Cuevas del Perro and San Carlos. There is also evidence of an important Roman settlement, around the 1st century, according to excavations carried out in the church area.


Located in Bajo Asón, this municipality is located in a privileged place on the eastern coast of Cantabria. It has the longest beach on the entire coastline and much of the Marshlands of Santoña, Noja and Joyel Natural Park.

Regarding its cultural heritage, the Church of Santa María de la Asunción It is the most relevant building in the town: declared National Historical-Artistic Monument for being one of the constructions gothic most important in Spain. The Old Puebla, it preserves the old urban structure of the Cantabrian coast during the 13th and 17th centuries. It comprises six streets, located around the Church of Santa Maria de la Asunción, which house various buildings of great cultural and historical importance. They are also great historical interest: the Atalaya Tunnel, the Soledad Dock, the Mirador del Abra, El Fuerte del Rastrillar, the House of the Four Temporas or the Dr.Velasco Schools

Asón Valley

In the interior of the easternmost part of Cantabria is this great geophysical space formed by the valleys of Asón and Soba. Stands out for its places of singular beauty, densely populated by beeches and holm oaks, and by the source of the Asón river: a spectacular waterfall 50 meters high.

The extraordinary abundance of caves Y if more have made this valley, and its surroundings, one of the points of care for cavers around the world. Numerous exploration campaigns have resulted in the discovery of hundreds of chasms and caves, some of which are among the largest known: the river cavities Silence (Rasines) has a total of 53 kilometers of explored galleries; those of Cueto-Coventosa (Arredondo) exceeds 30 kilometers of galleries, with a depth of 815 meters; the chasm of Garmaciega-Cellagua (Soba) also exceeds 800 meters deep; and the great underground hall of the Torista del Carlista (Ramales) is one of the largest on the planet.

It's huge speleological wealth of the Asón region is completed with the cultural heritage treasured by many of these cavities, which served as a refuge for various human groups at the time prehistoric. One of the most important rock art collections in the region is located around Ramales, in the caves of Covalanas, Cullalvera Y The Haza.

Cuevas prehistoricas de AsturiasRv2CS (January 2021)

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