Best natural monuments around Forua are intrinsically linked to its location within the Urdaibai Biosphere Reserve, a UNESCO-designated area. Forua is situated on the left bank of the Mundaka estuary, providing direct access to protected natural environments. The region features diverse landscapes, including extensive marshlands, holm oak forests, and low mountains with steep slopes. These natural settings offer opportunities for observing rich biodiversity and exploring various ecosystems.
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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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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Forua is located within the Urdaibai Biosphere Reserve, offering diverse natural landscapes. You can explore the extensive marshlands of the Mundaka Estuary, which are vital for migratory birds, and enjoy panoramic Views over the Urdaibai marsh. The region also features low mountains with holm oak forests and access to wild beaches like Laga and Laida.
Yes, several natural monuments are suitable for families. The Oma Forest, with its unique painted trees, offers an engaging outdoor art experience for all ages. The Views over the Urdaibai marsh are also family-friendly, providing easy access to observe the dynamic wetland ecosystem. Additionally, the Old Tree of Gernika (Gernikako Arbola) is a historical site that can be visited with children.
The Artzubi Bridge, a 16th-century Romanesque bridge, is a historical structure that blends seamlessly into its natural surroundings and is part of the Camino de Santiago. Another significant historical natural monument is the Old Tree of Gernika (Gernikako Arbola), an oak tree with deep historical and cultural significance for the Basque people.
Forua is surrounded by various hiking trails within the Urdaibai Biosphere Reserve, ranging from gentle strolls along the estuary to more challenging routes through low mountains and holm oak forests. These trails offer opportunities to connect with the rich ecosystem and enjoy panoramic views of the Urdaibai marsh. For more detailed hiking options, you can explore the Running Trails around Forua guide, which includes routes like the Punta de Murueta loop.
The Urdaibai Biosphere Reserve, where Forua is located, is beautiful year-round. Spring and autumn are particularly pleasant for hiking and birdwatching, as the weather is mild and migratory birds are abundant in the marshes. Summer offers warmer temperatures suitable for visiting the nearby beaches, while winter provides a quieter experience, though some trails might be muddy.
Absolutely. The Mundaka Estuary and its marshes, a central feature of the Urdaibai Biosphere Reserve, are the most significant wetland area in the Basque Country and a crucial site for migratory birds. You can observe species like grey herons, cormorants, Eurasian spoonbills, and ospreys. The Urdaibai Bird Center, located nearby, offers further information and observation points for bird enthusiasts.
Many outdoor areas and trails within the Urdaibai Biosphere Reserve are generally dog-friendly, provided dogs are kept on a leash and owners clean up after them. Specific rules may apply to certain protected areas or indoor facilities, so it's always best to check local signage. The general natural environment around Forua is welcoming for walks with pets.
Beyond hiking, the region around Forua offers various outdoor activities. You can enjoy road cycling or touring bicycle routes through scenic landscapes. For example, the Road Cycling Routes around Forua guide includes options like the 'Biscay Tour Trail: Gernika - Elantxobe Loop'. The nearby wild beaches of Laga and Laida are also popular for surfing and other water sports.
Public transport options, primarily buses, connect Forua with surrounding towns and key points within the Urdaibai Biosphere Reserve. While direct access to every single natural monument might require some walking, major attractions and trailheads are generally accessible. It's advisable to check local bus schedules for specific routes and destinations.
Parking availability varies by location. For popular sites like the Oma Forest or viewpoints over the Urdaibai marsh, designated parking areas are usually available. For smaller trailheads or more remote natural features, roadside parking might be an option. Always look for official parking signs and respect local regulations.
The Urdaibai Biosphere Reserve is a UNESCO-designated area recognized for its extraordinary natural beauty and ecological significance. Its heart is the Oka River, which forms a spectacular estuary and marshes, creating a unique habitat for diverse flora and fauna, especially migratory birds. The reserve encompasses a variety of landscapes, including beaches, cliffs, forests, and cultural heritage sites, making it a rich natural and cultural tapestry.
While the main highlights are well-known, exploring the numerous smaller trails throughout the Urdaibai Biosphere Reserve can lead to less-frequented spots. The dynamic nature of the estuary means that different viewpoints and marsh areas offer unique perspectives depending on the tide. Engaging with local guides or exploring less-traveled paths can reveal secluded natural beauty and quiet corners of the reserve.


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