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The Top 12 Caves in Biscay

Looking to visit a cave in Biscay on your next adventure? To help you better plan your next outdoor experience, we’ve collected Biscay’s 12 best caves for you. Based on the experiences of other users, each is a recommendation you know you can trust — so you can better plan your next adventure.

1
Abaro Tunnel

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  1. 1

    Like the Baltzola caves, it is now prohibited to cross them, due to the danger of Q fever.

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    Tip by oscargynko

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  2. 2

    Kortezubi is a municipality that preserves an extensive landscape, ecological and cultural heritage. It was chosen by our ancestors as a home and residence in prehistoric times, undoubtedly attracted by …

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    Tip by Urdaibai Basque Reserve

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  4. 3

    Former offices of one of the main iron extraction areas in the region. Currently the heart of the Ezkerraldea Biotope. A space protected by its categorization of the land.

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    Tip by Alirón Parkea

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  5. 4

    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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    Tip by oscargynko

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  7. 6

    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 …

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    Tip by oscargynko

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  8. 7

    You can go on an excursion with the children carrying flashlights through the galleries of the iron belt, it will be an unforgettable experience.

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    Tip by Alberto N. 🌲🚵🌳

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  9. 8

    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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    Tip by Marti Ferret

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to discover even more caves in Biscay.

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Last updated:
September 1, 2025

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