Best caves around Ason are found within the Alto Asón region, known for its extensive karstic cave systems. This area in Cantabria, Spain, features a diverse underground landscape shaped by water over millennia. Visitors can explore a network of caves, some with immense chambers and unique geological formations. The region offers opportunities for both accessible visits and more challenging caving expeditions.
Last updated: June 26, 2026
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Karst area and rugged terrain. Few indications of the path to the top. Some milestone of stones and scattered orange signs. It is essential to carry a GPS to navigate.
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Today we made the official visit to the cave, it's a pity they didn't let us take photos inside.
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La Torca del Carlista is one of several caves found in the Karranza valley. The cavity is located under the Peña Ranero mountain and a large part of it is located on Cantabrian soil. It stands out for its large size, as the main chamber is the fifth largest underground chamber in the world.
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Ramales has well-preserved architecture, with some Indian mansions with beautiful gardens and gates. The Revillagigedo palace (18th century) stands out. However, its most valuable heritage is the group of caves located at the beginning of the century by Alcalde del Río: Covalanas, La Haza, Cullalvera and Sotarriza house magnificent cave paintings inside.
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Just amazing and a ride for the whole family! It is a complex of karstic caves 12 km long with cavities of immense dimensions of up to 14 x 28 meters in some sectors. The water has been forming these incredible caves that fortunately today can be visited and explored. It is necessary to purchase tickets online, you can check here: https://cuevas.culturadecantabria.com/cullalvera-esp/
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"Official" cave close to the other homonymous one, in this case it was closed with a fence.
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Small and hidden cavity, hard to find
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In the middle of the Asón river path, on the way to Arredondo.
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The Ason region, particularly around Ramales de la Victoria, is rich in impressive cave systems. Notable caves include Cullalvera Cave, known for its immense dimensions and karstic formations, and Cueva Baranda, which is easily accessible and features a large internal pool. For those seeking a more challenging adventure, Torca del Carlista boasts one of the world's largest underground chambers.
Yes, Cullalvera Cave is highlighted as a family-friendly option, offering an amazing experience for all ages. It's easily accessible and provides a fascinating journey through its vast karstic complex.
Caves in the Ason region offer a range of difficulty levels. Cueva Baranda is considered intermediate and easily accessible, though it can be wet and slippery. More challenging options include Cueva del Agua, Cubera Cave, and Torca del Carlista, which are recommended for experienced cavers due to their rugged terrain and complex access.
The caves around Ason are part of a significant karstic system. You can expect to see impressive formations shaped by water over millennia, including immense cavities, stalactites, and stalagmites. For example, Cullalvera Cave features chambers up to 14 x 28 meters, while Torca del Carlista is renowned for its main chamber, which is one of the five largest underground chambers globally.
Yes, the area around Ramales de la Victoria is particularly rich in historical cave sites. This town is known for its group of caves, including Covalanas, La Haza, Cullalvera, and Sotarriza, which house magnificent cave paintings. These sites offer a glimpse into ancient human history and art.
For some caves, such as Cullalvera Cave, it is necessary to purchase tickets online in advance. It's always advisable to check the specific requirements for each cave you plan to visit, as some more challenging or protected sites might require special permits or guided tours.
When visiting caves in the Ason area, it's recommended to wear sturdy, non-slip footwear, as surfaces can be wet and slippery, even in easily accessible caves like Cueva Baranda. Layers of clothing are also advisable, as temperatures inside caves are consistently cool, regardless of the outside weather.
The Ason region offers diverse outdoor activities. You can enjoy gravel biking with routes like the 'A & C Tunnel Entrance – El Sobaco Tunnel loop' from Castaño auzunea, or explore easy hikes such as the 'Cueva de Cullalvera – circular from Camping La Barguilla'. For those interested in waterfalls, there are dedicated waterfall hikes, including the 'Asón Waterfall loop' from Asón. You can find more details on these activities in the gravel biking, easy hikes, and waterfall hikes guides for Ason.
Yes, there are several hiking trails in the vicinity of the Ason caves. For example, an easy circular hike starts from Camping La Barguilla by the Asón river, leading to Cueva de Cullalvera. Other options include the 'Asón Waterfall loop' and trails around Ramales de la Victoria. More hiking routes can be found in the easy hikes around Ason guide.
Visitors frequently highlight the sheer scale and natural beauty of the Ason caves. The immense dimensions of caves like Cullalvera Cave and the unique experience of exploring vast underground spaces are often praised. The ease of access for some caves, combined with the impressive geological formations, makes for a memorable adventure.


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