Best natural monuments around Muxika are situated within a region of significant natural beauty, primarily as part of the Urdaibai Biosphere Reserve and near the Urkiola Natural Park. This area in the Basque Country of northern Spain offers diverse ecosystems and notable natural features. The landscape includes estuaries, marshes, beaches, and mountainous terrain, providing a range of natural monuments for exploration.
Last updated: May 4, 2026
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The Oma Forest - Omako basoa in Basque - is also known as the painted forest, the enchanted forest or even the Ibarrola Forest. Its most common name - Oma Forest - refers to the district in which it is located, which belongs to the municipality of Kortezubi. This original work of art was created between 1982 and 1985, when the Basque painter and sculptor Agustín Ibarrola used the trunks of trees as a kind of canvas for a total of 47 images. On them he painted animals, geometric figures and people, or just parts of them, such as eyes and lips. In addition, many of the compositions do not consist of a single tree, but must be viewed in the context of several tree trunks. To do this, you must pay attention to the signs on the ground that tell the viewer where to stand in order to enjoy the whole image.
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When the Condor attacked, the residents of Guernica tried to protect the tree with their bodies because it is sacred to the Basques. Even today, elected politicians have to swear their loyalty to the Basque Country at an oak tree that stands a few meters away.
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In 1982, artist Agustín Ibarrola began painting the pine trees in the forest near his homestead with the intention of using the landscape as a canvas to give continuity to his artistic expression. It is at this moment when he decides to break the law of perspective and transgress the three-dimensionality of a white line until it becomes two-dimensional. From then on, he explored the possibilities offered by the arrangement of the forest trees, playing with the different planes of depth and creating artistic sets composed of human figures, curves or straight lines, and circles of intense colors. The ideas and concepts that it develops become more complex and advances in various directions as the painted forest expands. With the help of two students from the Faculty of Fine Arts of the UPV/EHU, he carried out a large part of the work that was open to the public until 2018, at which time the biological cycle of the forest came to an end. Given the importance that the work had acquired, the Provincial Council of Bizkaia began the process of making the Forest last, for which it had from the first moment the support of the artist who had made clear his desire for the forest to survive. In this way and in order to preserve El Bosque de Oma, the Ibarrola work has been moved to a new location, also recovering original artistic ensembles lost due to felling, attacks and natural tree falls. Today we can enjoy El Bosque de Oma more complete and more faithful to the artist's original idea.
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The Forest of Oma is one of the best-known works of the Basque artist Agustín Ibarrola and is an expression of the artistic movement known as Art and Nature, which emerged in the late sixties of the 20th century and whose purpose is to convey artistic work to the natural environment, using the landscape as a framework, support and raw material for the artist. The work, located in the town of Kortezubi (Bizkaia), is made up of several sets of geometric motifs and figures painted on the trunk of radiata pine trees. The use of natural living supports, the play of two-three-dimensionality and the experience of placing the visitor at the center of the work of art through his discovery, as well as the diversity of responses it proposes, make this work a reference of the Art and Nature movement and of Basque Art in particular.
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Gernikako Arbola is an oak tree in the Basque city of Gernika.
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This bridge is an incredible find in the middle of the forest. It is covered with ivy and in summer it is so green that it is hardly visible. If you go down next to the river you can take some great photos with the water and the bridge. For many years this bridge has had to survive numerous floods. It's amazing that he's still here.
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The Artzubi Romanesque bridge was built in the 16th century. Wherever you see it, it has overcome floods and floods from the Golako River, which passes below and flows into the Oka River. In another time there were more bridges like this one, but it is the only one in the area that has endured. https://www.urdailife.com/artzubi-puente-cuento-arratzu-mendata/
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Planted in 1742 to replace the Parent Tree. In 1839, the regent María Cristina swore the Fueros on behalf of Queen Isabel II; this was the last time this rite took place.
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Around Muxika, you can discover a blend of natural beauty and artistic expression. The Oma Forest, also known as the Painted Forest of Oma, features trees painted by artist Agustín Ibarrola, creating a unique open-air art gallery. You can also visit the historic Artzubi Bridge, a 16th-century Romanesque bridge that has withstood numerous floods and is part of the Camino de Santiago.
Yes, several natural monuments around Muxika hold significant historical value. The Old Tree of Gernika (Gernikako Arbola) is a powerful symbol of Basque liberties and history. Additionally, the Ereño Marble Quarries, though now disused, were exploited by Romans in the 1st century AD, making Ereño a historical 'Capital of the marble route'.
For breathtaking panoramic views, head to the Balcón de Bizkaia Viewpoint. Located on the slopes of Mount Oiz, it offers expansive views of the mountainous landscape of the Urdaibai basin and its dense forest masses. The Peñón de Ogoño also provides impressive coastal vistas within the Urdaibai Biosphere Reserve.
The region around Muxika offers diverse outdoor activities. You can find numerous hiking trails, such as the moderate 'Autzagane – Bizkargi loop' or the more challenging 'Artzubi Bridge – Guernica Mural in Gernika loop'. For mountain biking enthusiasts, there are routes like 'Monte Oiz – circular from Albiz'. You can explore more options on the Hiking around Muxika and MTB Trails around Muxika guide pages.
Absolutely! The Oma Forest is a fantastic family-friendly destination where children can enjoy discovering the painted trees. The Old Tree of Gernika is also suitable for families, offering a historical and cultural experience. Additionally, the Balcón de Bizkaia Viewpoint provides easy access to stunning views for all ages.
The best time to visit the natural monuments around Muxika is generally during spring (April to June) and autumn (September to October). During these seasons, the weather is typically mild and pleasant for outdoor activities like hiking and exploring. Spring brings lush greenery, while autumn offers beautiful fall foliage, especially in areas like the Oma Forest.
Yes, the Urdaibai Biosphere Reserve, which Muxika is part of, is a prime location for wildlife observation, particularly birdwatching. The Urdaibai Estuary and Marshes are crucial resting and wintering grounds for numerous migratory birds. The Urdaibai Bird Center offers an excellent vantage point for observation.
While Muxika itself is inland, its proximity to the Urdaibai Biosphere Reserve means you're close to beautiful coastal areas. Laida and Laga Beaches are among the finest in the Basque Country, offering fine sand and opportunities for water sports like windsurfing, canoeing, paddleboarding, and surfing.
The region boasts diverse geological features. Within the Urdaibai Biosphere Reserve, you'll find the unique estuary and marshland formations. Nearby, the Urkiola Natural Park is characterized by dramatic limestone landscapes, including rugged peaks like Mount Anboto, deep ravines, and the stunning Atxarte Gorge with its huge limestone walls popular for rock climbing.
Visitors particularly appreciate the unique blend of nature and art found at the Oma Forest, often describing it as an 'enchanted forest'. The historical significance of sites like the Old Tree of Gernika also resonates deeply. Many enjoy the serene beauty and the broad, sweeping views from vantage points like the Balcón de Bizkaia Viewpoint, which offers a sense of the region's vast natural landscape.
Yes, within the Urdaibai Biosphere Reserve, near Kortezubi, lies the Santimamiñe Cave. This significant archaeological site contains human remains dating back over 14,000 years and remarkable cave paintings from the Magdalenian period, depicting various animals. While access to the original cave may be restricted for preservation, it represents a profound intersection of natural geology and ancient human history.
For those seeking a challenge, the nearby Urkiola Natural Park offers demanding mountaineering experiences. Mount Anboto, the highest peak in the Urkiola range, is a popular destination for mountaineers, known for its rugged slopes and its connection to Basque mythology as the abode of the goddess Mari. Several difficult routes, such as the 'Monte Oiz Summit – Monte Oiz loop', can be found in the wider region.


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