Caves around Artea offer a range of underground experiences within the Basque Country, characterized by its notable karst landscapes. This region in Bizkaia features natural monuments and geological formations. Visitors can explore ancient sites and natural features, providing insights into both geology and historical human presence.
Last updated: May 6, 2026
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Like the Baltzola caves, it is now prohibited to cross them, due to the danger of Q fever.
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This part of the Baltzola caves was normally the exit.
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Impressive cavity, until a while ago you could go through. They have recently put up a sign, warning of the danger of contracting Q fever, and the passage is prohibited.
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Cave inside the so-called Great Central Crack, in the Itzina Massif. Its interior can be accessed by descending the ramp of the natural tunnel from the mouth of Axlegor, municipality of Orozko (Bizkaia).
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In the rainy season, you may not be able to cross the tunnel without getting your feet wet. But it is impressive to find this at the beginning.
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One of the most beautiful caves I have ever seen. First because of the location, second because of the small challenge of not getting lost to get there, and thirdly because it is super cool: a huge mouth and easy to travel (with a flashlight) a good stretch. Absolutely recommended.
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Beautiful area, it is recommended or almost mandatory to carry a flashlight, since although the cave is short and does not involve much difficulty, it is always good to see where you put your feet
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Very close to the beginning of the route, it is a surprising area.
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The region boasts diverse geological formations. For instance, Supelegor is a natural monument known for its impressive size and interior. Further afield, Pozalagua Cave, though not directly in Artea, is renowned for having one of the world's largest concentrations of eccentric stalactites, also known as helictites, creating a surreal underground landscape.
Yes, San Martín Hermitage and Caves is considered family-friendly, offering two small caves adjacent to a religious building and picnic facilities. It's a good option for a relaxed visit.
The caves in the Artea region and wider Bizkaia area have significant historical value. Santimamiñe Cave, a UNESCO World Heritage site, is celebrated for its well-preserved Stone Age cave paintings. While direct entry is restricted for conservation, visitors can experience a virtual tour. Baltzola Cave also holds archaeological remains, indicating ancient human presence.
The area around Artea offers various outdoor activities. You can find numerous hiking trails, including routes like 'Arteako Benta – Church of Saint Peter the Apostle loop from Artea'. For cycling enthusiasts, there are routes such as 'Saldropo Wetland – Alto de Dima loop from Igorre'. You can explore more options on the Hiking around Artea or Cycling around Artea guide pages.
Some caves have specific access conditions. For example, crossing Abaro Tunnel and Baltzola Caves is currently prohibited due to the danger of Q fever. For accessible caves like Pozalagua, guided tours are typically required, and it's advisable to check their official website for booking and specific requirements.
When exploring caves like Abaro Tunnel or Supelegor, a flashlight is recommended, and in the rainy season, you might get your feet wet, so appropriate footwear is advised. Caves generally maintain a cool, constant temperature, so a light jacket can be comfortable.
Yes, the region is rich in natural parks with caves. Axlaor Cave is located within the Itxina Massif in Gorbea Natural Park. Additionally, Pozalagua Cave is situated within the Armañón Natural Park, and Santimamiñe Cave is in the Urdaibai Biosphere Reserve.
Visitors appreciate the natural beauty and the sense of adventure. For Supelegor, people enjoy the challenge of reaching it and the impressive, easy-to-travel interior. The unique formations and the historical significance of sites like Santimamiñe also leave a lasting impression.
The duration varies depending on the cave. For smaller, more accessible caves like the ones at San Martín Hermitage, a visit might be relatively short, perhaps an hour or less. Larger, more complex caves or those requiring guided tours, such as Pozalagua, can take 1-2 hours for a full experience.
Yes, Supelegor is not only a cave but also a natural monument and a viewpoint, offering scenic surroundings. The Forat de Bèrnia, though further south near Altea, is a natural tunnel that provides panoramic views of the coast and mountains from its entrances.
While the main highlights are well-documented, the region's karst landscape means there are many smaller, less-explored cavities. For a unique experience, Axlaor Cave, located within the Itxina Massif, offers access by descending a ramp from the mouth of Axlegor, providing a more adventurous feel within Gorbea Natural Park.
Specific parking and public transport details vary by cave. For popular sites like Pozalagua Cave, there are designated parking areas. For more remote caves or those within natural parks, access might involve hiking from a nearby village or trailhead. It's best to check local information for each specific cave you plan to visit.


Extend your search for the best caves by checking out these guides of the top ones around Artea: