Best natural monuments around Murueta are primarily found within the Urdaibai Biosphere Reserve, a UNESCO-recognized natural region. This area, situated in the Basque Country, offers a rich variety of ecosystems including extensive marshlands, rivers, and forests. Murueta's location on the Urdaibai River provides access to significant natural features and diverse landscapes. The region is a notable site for biodiversity, making it a valuable natural heritage destination.
Last updated: May 3, 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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Urdaibai is an extraordinarily beautiful and varied natural space, which is why it was declared a Biosphere Reserve by UNESCO in 1984. Its heart is the Oka River that rises on Mount Oiz and transforms into an estuary upon reaching Mundaka, creating spectacular marshes full of life. We recommend you see them at different times of the day to be able to appreciate both low and high tide. But in addition to unique marshes, Urdaibai offers you some of the most beautiful and appreciated beaches in Euskadi, Laida, which constantly varies in shape and size or the spectacular Laga beach, located under the imposing Peñón de Ogoño, which many define as “the closest thing to paradise.”
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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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The Murueta area is nestled within the Urdaibai Biosphere Reserve, a UNESCO-recognized natural region. This area is rich in diverse ecosystems, including extensive marshlands, rivers, beaches like Laida and Laga, cliffs, and forests. The heart of the reserve is the estuary of the Oka River, which creates spectacular wetlands teeming with life, making it a significant natural heritage site.
Yes, the area offers a blend of natural beauty and historical significance. You can visit the Artzubi Bridge, a well-preserved 16th-century Romanesque bridge that forms part of the Camino de Santiago. Additionally, the Old Tree of Gernika (Gernikako Arbola) is a significant historical and cultural symbol in the nearby city of Gernika.
The Urdaibai Biosphere Reserve is a vital stopover point for numerous migratory birds, making it a paradise for birdwatching. The marshes and wetlands are particularly rich in avian species. The ever-changing landscape of the wetlands, especially at high and low tide, supports a diverse range of flora and fauna.
Absolutely. The Oma Forest, with its unique painted trees creating optical illusions, is a fantastic and engaging experience for families. The Views over the Urdaibai marsh offer accessible scenic beauty, and the nearby beaches like Laida are great for family outings and water activities. The Old Tree of Gernika is also considered family-friendly.
The region around Murueta, particularly within the Urdaibai Biosphere Reserve, offers a variety of outdoor activities. You can enjoy running on trails like the 'Urdaibaiko biosfera erreserba – Erromatar herrixka loop' or 'Urdaibai Wetlands – Church of Santa María loop' found in the Running Trails around Murueta guide. Cycling and gravel biking are also popular, with routes such as the 'Tour of Biscay: Urdaibai Coast Loop' available in the Cycling around Murueta guide and Gravel biking around Murueta guide. Beaches like Laida are excellent for water sports.
For incredible landscapes of the Urdaibai marsh, head to the viewpoint offering Views over the Urdaibai marsh. This spot provides a dynamic perspective of the long tongue of water and sand, whose configuration changes with the tides. The entire estuary is surrounded by roads that allow you to appreciate the sand islands within.
The Oma Forest, also known as the Painted Forest, is a unique artistic intervention by Basque artist Agustín Ibarrola. Located near Kortezubi within the Urdaibai Biosphere Reserve, it features geometric motifs and figures painted on pine trees. These artworks create optical illusions that can be fully appreciated from specific perspectives, offering a distinctive blend of art and nature.
Yes, the Santimamiñe Cave, located in nearby Kortezubi within the Urdaibai Biosphere Reserve, is a significant archaeological site. It contains impressive cave paintings dating back 14,000 years from the Magdalenian period, depicting animals like bison, horses, and bears. It's a natural and cultural treasure worth exploring.
The Urdaibai Biosphere Reserve is beautiful year-round, but the best time depends on your interests. Spring and autumn are ideal for birdwatching due to migratory patterns. Summer is perfect for enjoying the beaches and water sports at Laida and Laga. The mild climate of the Basque Country generally makes outdoor activities pleasant from spring through early autumn.
Yes, within the Urdaibai Biosphere Reserve, you'll find excellent beaches for water sports. Laida Beach is known for its fine sand and is suitable for windsurfing, canoeing, paddleboarding, and surfing. Laga Beach, situated at the foot of the imposing Peñón de Ogoño, is another wild and beautiful beach popular for its waves and natural setting.
The Urdaibai Biosphere Reserve can be explored in many ways. You can hike or cycle along its numerous trails, observe migratory birds at the Urdaibai Bird Center, enjoy water sports at its beaches, or simply take in the panoramic views from various viewpoints. The reserve encompasses a rich variety of ecosystems, from marshes and rivers to beaches and forests, offering diverse experiences for visitors. More information can be found on Visit Biscay's website.
Visitors particularly appreciate the dynamic and well-preserved ecosystem of the Urdaibai marsh, noting how its configuration changes with the tides. The Oma Forest is highly praised for its unique artistic experience, where painted trees create captivating optical illusions. The historical significance and natural integration of the Artzubi Bridge also receive positive feedback for its beauty and preservation.


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