Best caves around Amurrio are found within a region characterized by diverse natural landscapes, including limestone massifs and natural parks such as Aizkorri-Aratz and Gorbea. These areas feature significant geological formations, shaped over millions of years by water erosion. The municipality of Amurrio serves as a gateway to exploring these underground environments and natural monuments. The region offers various opportunities for discovering its unique subterranean features.
Last updated: July 4, 2026
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Lezabaltz (from "leza" (chasm) and "baltz" (black) in the local Basque) is the name given to one of the ten access points to the Austegiarmin karst drainage network. It is an impressive chasm, with a wide mouth and 35 meters deep, well known to the shepherds of the main sheepfold in Orozko (Bizkaia), whose huts are located just over 100 meters away in a straight line. Be very careful!
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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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Splendid hole, through which you can get. And I have heard that you can even go out 400 meters further, but I have not tried it.
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A beautiful cave in the middle of the Sierra, ideal to shelter for a while on hot or rainy days.
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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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Beyond the local highlights, the broader Álava province offers impressive cave systems. The Cueva de La Leze, located in Aizkorri-Aratz Natural Park, is a dramatic canyon-cave popular for canyoning. Another significant site is the Cuevas de Mairuelegorreta in Gorbea Natural Park, an extensive system with over 12 kilometers of galleries and rich in Basque mythology. Locally, you can explore Supelegor, known for its huge mouth and easy accessibility, or the Axlaor Cave within the Itxina Massif.
While some caves in the region are more suited for experienced adventurers, Supelegor is often described as easy to travel with a flashlight, making it a good option for families looking for a less challenging experience. For more adventurous families, guided tours in places like Cueva de La Leze or Cuevas de Mairuelegorreta might be available, offering a safe way to explore deeper.
The difficulty varies significantly. Caves like Supelegor are considered intermediate, offering relatively easy exploration with a flashlight. Others, such as Sima Lezabaltz, are challenging chasms with significant vertical drops, requiring specialized equipment and experience. Always check the specific requirements for each cave.
For some of the more extensive or protected cave systems, like Cuevas de Mairuelegorreta, access might be restricted or require permits, especially for deeper exploration. It's always best to check with local authorities or guided tour operators for the specific cave you plan to visit, as regulations can vary.
You can expect to see impressive geological formations carved by water over millions of years. For instance, the Cueva de La Leze is a massive canyon-cave, showcasing powerful erosive action. Other caves, like Cuevas de Mairuelegorreta, feature extensive galleries and significant paleontological sites. You'll encounter unique rock formations, stalactites, and stalagmites, and experience the distinct underground environment.
The region around Amurrio is excellent for various outdoor activities. You can find numerous mountain hikes, including routes in Gorbea Natural Park where Cuevas de Mairuelegorreta is located. There are also options for cycling and traffic-free bike rides. For adventure seekers, Cueva de La Leze is a popular spot for canyoning.
For most cave explorations, even easier ones, it's advisable to wear sturdy, closed-toe shoes with good grip, and comfortable clothing that you don't mind getting dirty. Caves can be cool and damp, so layers are recommended. For more challenging caves or guided tours, specialized caving gear like helmets, headlamps, and harnesses will be provided or required.
Many caves maintain a relatively constant temperature year-round, making them potentially accessible in winter. However, access to cave entrances might be affected by snow or ice, especially in higher elevations or natural parks. It's best to check local conditions and opening hours, or inquire with guided tour operators, as some may offer winter excursions.
Most natural caves, due to their uneven terrain, narrow passages, and vertical elements, are not typically accessible for visitors with limited mobility. The caves around Amurrio, including those mentioned, generally require a degree of physical agility. It's recommended to contact specific cave operators or visitor centers for detailed accessibility information.
Access for dogs to caves is generally restricted due to safety concerns, potential disturbance to wildlife, and preservation of the delicate cave environment. While some outdoor areas leading to caves might be dog-friendly, it's highly unlikely that dogs are permitted inside the caves themselves. Always check specific regulations for each site.
The duration of a cave exploration varies greatly depending on the cave's size, complexity, and whether you're on a guided tour. A simple walk into a cave like Supelegor might take an hour or two. More extensive systems, such as Cuevas de Mairuelegorreta, can involve multi-hour guided caving expeditions. Always plan according to the specific cave and your experience level.
Parking availability depends on the specific cave's location. For caves within natural parks like Aizkorri-Aratz or Gorbea, designated parking areas are usually available at trailheads or visitor centers. For more remote caves, parking might be limited to roadside pull-offs. Always check maps or local information for the best parking options before your visit.
While direct amenities at cave entrances are rare, you'll typically find cafes and restaurants in the nearby towns and villages. For example, if visiting caves in Gorbea Natural Park, you can find options in the surrounding communities. Amurrio itself offers various dining choices. It's a good idea to pack snacks and water, especially for longer explorations.


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