Best natural monuments around Munitibar-Arbatzegi Gerrikaitz offer a diverse range of natural and cultural landscapes in the Basque Country. The region features significant ecological areas, unique artistic installations, and historical sites. These locations provide opportunities to explore varied ecosystems, from marshlands and forests to scenic viewpoints. Munitibar-Arbatzegi Gerrikaitz is part of the Urdaibai Biosphere Reserve, highlighting its ecological importance.
Last updated: July 1, 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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The region offers several unique natural monuments. The Oma Forest, also known as the Painted Forest, is an open-air art installation where trees are painted with figures and geometric shapes, creating an interactive experience. Another significant site is the Artzubi Bridge, a well-preserved 16th-century Romanesque bridge that blends beautifully with its natural surroundings and is part of the Camino de Santiago.
Munitibar-Arbatzegi Gerrikaitz is located within the Urdaibai Biosphere Reserve, a UNESCO-designated natural treasure on the Basque coast. This reserve features diverse landscapes including extensive beaches, marshlands, forests, cliffs, and capes, making it crucial for birdlife and marine species. You can experience it through hiking, birdwatching, and exploring its various ecosystems. The Balcón de Bizkaia Viewpoint offers panoramic views of this region.
Yes, several natural monuments in the region have historical importance. The Artzubi Bridge is a 16th-century Romanesque structure that has stood for centuries. The Old Tree of Gernika (Gernikako Arbola) is a symbolic oak tree with deep historical roots in Basque culture. Additionally, the Ereño Marble Quarries were exploited by Romans as early as the 1st century AD, highlighting the region's ancient industrial past.
Absolutely! The Oma Forest is considered family-friendly, offering a magical and interactive experience as you discover the painted trees. The Balcón de Bizkaia Viewpoint is also suitable for families, providing stunning panoramic views that everyone can enjoy. The Old Tree of Gernika is another accessible historical site for all ages.
The Oma Forest is accessed on foot, typically a 2.8 km (50-minute) walk from Santimamiñe. Admission is free, but booking in advance is required. The artwork is designed so that many figures are only fully visible from specific viewpoints, making it an interactive experience. Due to a fungal disease, the original artwork has been relocated and reproduced in the nearby Basobarri Forest, featuring more painted trees. You can find more information about booking and visiting on the official tourism website: visitbiscay.eus.
The region offers a variety of outdoor activities. You can explore numerous hiking trails, such as the 'Bajo el río Lea' route along the River Lea, or routes around Mount Oiz. There are also extensive options for mountain biking and road cycling. For detailed routes and guides, you can check out the Hiking around Munitibar-Arbatzegi Gerrikaitz, MTB Trails around Munitibar-Arbatzegi Gerrikaitz, and Road Cycling Routes around Munitibar-Arbatzegi Gerrikaitz guides.
Yes, there are many hiking opportunities. For example, you can hike along the River Lea, which offers a recommended circular route called 'Bajo el río Lea' (Under the Lea River), a 2.82 km itinerary. Trails also lead to the Balcón de Bizkaia Viewpoint on Mount Oiz. For more hiking options, including routes like 'Mount Oiz Summit' or 'Artzubi Bridge – Guernica Mural in Gernika loop', refer to the Hiking around Munitibar-Arbatzegi Gerrikaitz guide.
The Basque Country generally enjoys a mild climate. Spring and autumn are often ideal for visiting, with pleasant temperatures for outdoor activities like hiking and exploring. These seasons also offer lush greenery or vibrant autumn colors. Summer can be warm, perfect for coastal areas within the Urdaibai Biosphere Reserve, while winter is milder than many other parts of Europe, though some trails might be less accessible.
The area boasts a rich variety of natural features, largely due to its location within the Urdaibai Biosphere Reserve. You'll find extensive forests, particularly holm oak forests, marshlands vital for birdlife, and the scenic River Lea. The landscape also includes dramatic cliffs and capes along the coast, and mountainous terrain around Mount Oiz, offering diverse ecosystems and stunning vistas.
Visitors particularly appreciate the unique blend of nature and art found at the Oma Forest, where the painted trees create a magical and thought-provoking experience. The historical charm of sites like the Artzubi Bridge, blending seamlessly with its natural surroundings, is also highly valued. Many are captivated by the panoramic views from the Balcón de Bizkaia Viewpoint, offering broad perspectives of the Urdaibai region's mountainous and forested landscapes.
Yes, the Balcón de Bizkaia Viewpoint, located on the slopes of Mount Oiz, is an excellent spot for panoramic views. It offers a unique perspective of the Urdaibai region, including its mountainous landscapes, extensive forest mass, and the Cantabrian Sea in the background. It's a fantastic location for photography and enjoying breathtaking scenery.
The River Lea is considered an exemplary river in terms of conservation and offers excellent opportunities for nature observation and walks. The 'Bajo el río Lea' (Under the Lea River) is a recommended 2.82 km circular route that allows visitors to explore the fluvial landscapes of the valley. The Lea Ibilbidea (Lea Route) is also a significant leisure infrastructure promoting outdoor activities alongside the river.


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