Best natural monuments around Gizaburuaga include features that highlight the region's prehistoric past and its strong connection to the natural environment. The area's natural allure is deeply intertwined with its history, particularly around the Lea River and its ancient caves. Gizaburuaga's strategic location also provides access to broader natural wonders like the Urdaibai Biosphere Reserve, offering a blend of natural exploration and historical insight. These natural landmarks provide diverse opportunities for outdoor activities.
Last updated: May 20, 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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Gizaburuaga offers a variety of natural monuments, including the unique Oma Forest, known for its painted trees. You can also explore the historical Artzubi Bridge, a 16th-century Romanesque structure, and enjoy expansive views from the Balcón de Bizkaia Viewpoint.
Yes, several natural monuments in the area are rich in history. The Artzubi Bridge, a Romanesque bridge from the 16th century, is part of the Camino de Santiago. Additionally, the Old Tree of Gernika (Gernikako Arbola), though located near Gizaburuaga, is a powerful symbol of Basque liberties and history. The region's prehistoric caves also hold evidence of ancient settlements.
For breathtaking views, visit the Balcón de Bizkaia Viewpoint. From here, you can take in the mountainous landscape of the Urdaibai basin and the extensive forest mass of the area.
Yes, the Oma Forest, with its unique painted trees, is considered family-friendly. The Old Tree of Gernika and the Balcón de Bizkaia Viewpoint are also suitable for families.
The Oma Forest stands out as a unique artistic expression, where geometric motifs and figures are painted directly onto tree trunks, transforming the landscape into a canvas. The region also features ancient caves that offer a glimpse into prehistoric environments.
The area around Gizaburuaga offers diverse outdoor activities. You can find numerous routes for gravel biking, cycling, and running. These activities allow you to explore the natural beauty and historical sites of the region.
The Lea River is a central natural element, defining much of Gizaburuaga's character with its combination of water and forest. Though short, its intense flow from the Oiz mountain massif has shaped the landscape and is historically tied to ancient forges, mills, and bridges, showcasing centuries of interaction between humans and nature.
Yes, the Ereño Marble Quarries are a notable geological site. These quarries, now disused, were exploited for their marble as early as the 1st century AD by the Romans, making them a significant historical and geological landmark.
The best time to visit is generally during spring and autumn when the weather is mild and pleasant for outdoor exploration. Summer also offers good conditions, though it can be warmer. Winter can be beautiful but may have cooler temperatures and occasional rain.
Yes, Gizaburuaga is conveniently located near the Urdaibai Biosphere Reserve. This significant protected natural area in the Basque Country offers rich biodiversity, lush cliff landscapes, and diverse ecosystems, providing additional opportunities for nature observation and outdoor activities.
The terrain around Gizaburuaga's natural monuments often features a prevailing mountainous and rural landscape. You can expect a mix of forest paths, riverbanks, and potentially some inclines, especially when accessing viewpoints like the Balcón de Bizkaia Viewpoint, which is located on the slopes of the Oiz mountain.


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