Best caves around Arantza offer diverse subterranean experiences within a region known for its natural beauty and unique geological formations. The area features distinct caving opportunities, from adventurous explorations of large galleries to educational insights into cave formation. Arantza's landscape includes rare hornbeam forests and natural sanctuaries, providing a rich setting for exploring underground wonders. These caves present opportunities to observe limestone formations and experience natural darkness.
Last updated: August 13, 2026
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Access to the foot of the waterfall is dangerous and from the path, you can't see much ☹️
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Forest trail along the Karrika River. The trail passes through a small tunnel near Bidaita. The forested landscape is the perfect setting for any good hike.
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The Aitzondo waterfall is located in the Aiako Harria natural park, at the western end of the Pyrenees. This waterfall is one of the largest in Guipuzcoa, with a drop of 140 meters that ends in a small pond.
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One of the peaks of Peñas de Aia is home to the Junkal cave, a cavity that is the object of mountain celebrations.
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Hello, I have already been to this waterfall, but do not know the way to get to the foot of the waterfall. Do you have a trace that goes there? Thanks
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You can't get here because the route no longer exists (slipped). Just follow the trail marker instead of komoot. At the end there is a great river where you can refresh yourself in the summer
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There are some amazing caves worth it to see on the way to the waterfalls. These are the coordinates to the entrance of these caves: 43° 18' 43.1316" N, -1° 46' 23.9534" W / 866G+QM, Irún, Gipuzkoa
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A spiritual sanctuary within another natural sanctuary. That is San Juan Xar. An area declared a Nature Reserve in 1987 for housing the only native hornbeam forest or Carpinus betulus, also known as birches, on the peninsula. In addition to the hornbeam, we can see century-old chestnut trees, maples, oaks and ash trees. In the heart of this unique spot located in the heart of the western Pyrenees, we find a cave-hermitage with a fountain with three jets whose waters, according to popular belief, have miraculous healing powers against skin conditions. It is tradition that you first drink from each of the pipes and then rub the affected part with a wet cloth. Then, the handkerchiefs are left in the surroundings of the fountain, and later the priest will pick them up and burn them. The custom has been around for a long time, for this reason, before the image of Saint John the Baptist, who today inhabits the cave, arrived here, the prayers and offerings were for the lamiak, nymphs who, according to mythology, inhabited this area since the dawn of the weather.
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The caves in the Arantza region boast huge galleries carved by water over millennia, filled with fantastic limestone formations such as stalactites, stalagmites, gours, and helictites. You can also experience environments of total darkness and hear natural sounds. The Aitzondo Waterfall area also features amazing caves near one of Guipuzcoa's largest waterfalls.
Yes, the San Juan Xar Cave Shrine is a notable cave-hermitage nestled within the only native hornbeam forest in the Iberian Peninsula. It features a natural water source with three jets, traditionally believed to possess healing powers for skin conditions. Visitors often leave handkerchiefs after using the water, a custom rooted in local folklore.
For adventurous explorers, the small caves at Arantza offer a guided caving experience. This involves navigating short passages and a 3-meter rope climb, providing an intimate encounter with untouched nature and profound darkness. This activity is recommended for those with some caving experience and lasts approximately 3.5 hours, with about 2 hours spent inside the cave.
Absolutely. The Arruzpi cave is specifically highlighted for its educational value regarding cave formations. Activities within this cave aim to teach visitors how caves are formed and the different types of geological structures found within them, such as stalactites, stalagmites, gours, and helictites.
While some caving experiences, like the small caves at Arantza, are not suitable for children under 10 due to their adventurous nature and rope climbing, the Arruzpi cave offers educational activities that could be suitable for older children interested in geology. The San Juan Xar Cave Shrine, with its unique forest setting and folklore, also offers a more accessible natural and cultural experience for families.
Caving experiences in Arantza range from intermediate to challenging. For instance, the small caves at Arantza require some prior caving experience and involve a 3-meter rope climb. The Filón de San Joaquín Cave is also categorized as challenging. Other sites like the San Juan Xar Cave Shrine are more accessible, offering a natural monument experience without technical caving.
The Arantza area offers a variety of outdoor activities. You can find numerous cycling routes, including touring bicycle options like the Bera – Bidassoa Railway Tunnels loop. For road cycling, there are routes such as the Lesaka - Zugarramurdi loop. Mountain biking enthusiasts can explore trails like the Vuelta por Artikutza. Many of these routes pass through scenic landscapes, sometimes near other natural features or even tunnels.
Yes, the Karrika River Trail to Bidaita is a forest trail that passes through a small tunnel near Bidaita. Additionally, the San Juan Xar Cave Shrine is located within a nature reserve, offering opportunities for walks through a rare hornbeam forest leading to the cave-hermitage.
Visitors appreciate the diverse experiences, from the spiritual and natural beauty of the San Juan Xar Cave Shrine and its unique hornbeam forest, to the adventurous exploration of the small caves. The geological insights offered by the Arruzpi cave are also highly valued. The integration of caves with other natural wonders like the Aitzondo Waterfall and the Junkal cave on Muganix Summit also adds to the appeal.
Yes, the Aterpe de Arantza Hostel is mentioned as catering to groups interested in the Arruzpi cave experience. Arantza village itself offers various accommodation options, including cafes and pubs, providing convenient bases for exploring the region's subterranean wonders.
The Junkal cave is a cavity located on Muganix Summit (758 m), one of the peaks of Peñas de Aia. It is known as a site for mountain celebrations, blending natural exploration with local traditions.
Yes, the Aitzondo Waterfall features amazing caves located on the way to the falls. This waterfall is one of the largest in Guipuzcoa, with a 140-meter drop, making the caves part of a spectacular natural water landscape.


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