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Arratzu

Top 20 Natural Monuments around Arratzu

Best natural monuments around Arratzu are situated within the Urdaibai Biosphere Reserve in Bizkaia. This region features a blend of rural landscapes, historical heritage, and significant natural areas. The municipality is characterized by its ecological importance, diverse ecosystems, and protected natural spaces. Visitors can experience estuaries, rivers, karst formations, and holm oak forests.

Best natural monuments around Arratzu

  • The most popular natural monuments is Oma Forest, a forest that features geometric motifs and figures painted on tree trunks by…

Last updated: July 1, 2026

Artzubi Bridge

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Beautiful Romanesque bridge from the 16th century blending in with the surroundings.
The itinerary of the Camino de Santiago from the north or from the coast runs over it.

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Old Tree of Gernika (Gernikako Arbola)

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Oak specimen located in front of the Casa de Juntas in the Biscayan town of Guernica y Luno in the Basque Country, Spain. This tree symbolizes the traditional liberties of …

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Oma Forest

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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 …

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Views over the Urdaibai marsh

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From this stretch of road you can enjoy the incredible landscape of the Urdaibai marsh. A long tongue of water and sand whose configuration changes with the tides and is …

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Urdaibai

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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 …

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Thomas
December 30, 2024, Bosque de Oma

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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Vicent CT
May 16, 2024, Urdaibai

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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Edwin
April 17, 2023, Puente Artzubi

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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Frequently Asked Questions

What makes the natural monuments in Arratzu unique?

Arratzu's natural monuments are unique due to their location within the Urdaibai Biosphere Reserve, a UNESCO-declared area known for its outstanding natural and cultural significance. The region offers a blend of rural charm, historical heritage, and rich natural landscapes, including estuaries, rivers, karst formations, and ancient oak forests.

Are there any natural monuments with historical significance in the area?

Yes, Arratzu features several sites with historical importance. The Artzubi Bridge, a well-preserved Romanesque bridge from the 16th century, is part of the Camino de Santiago route. Additionally, the Old Tree of Gernika (Gernikako Arbola), an oak tree in nearby Gernika, holds deep historical and symbolic meaning for the Basque people.

Are there family-friendly natural monuments around Arratzu?

Absolutely. Many natural monuments in the area are suitable for families. The Oma Forest, with its painted trees, offers a unique and engaging experience for all ages. The Views over the Urdaibai marsh provide an accessible viewpoint to observe the dynamic ecosystem. The Senda del Golako is also a family-friendly hiking route that guides visitors through beautiful landscapes.

What is the best time to visit the natural monuments in Arratzu?

The natural monuments in Arratzu, particularly the Arratzu Oak Grove, offer varying beauty across seasons. Spring and autumn are often ideal for hiking and enjoying the lush greenery or vibrant fall colors. The Urdaibai marsh is dynamic year-round, with its landscape changing with the tides, making it interesting to observe at different times of day.

What outdoor activities can I do near these natural monuments?

The area around Arratzu offers a variety of outdoor activities. You can explore numerous hiking routes, including the Senda del Golako which passes through the Artzubi oak grove. There are also many road cycling routes and running trails that allow you to experience the diverse landscapes of the Urdaibai Biosphere Reserve.

Are there hiking trails that connect to these natural monuments?

Yes, the Senda del Golako is a notable 5-kilometer family-friendly hiking route that guides visitors through beautiful landscapes, including the Artzubi oak grove and along the Golako River. You can find more options for hiking around Arratzu, with routes like the 'Church of Santo Tomás – Artzubi Bridge loop from Mendata' offering easy access to historical sites.

Where can I find panoramic views of the Urdaibai marsh?

For incredible panoramic views of the Urdaibai marsh, visit the Views over the Urdaibai marsh viewpoint. This location offers a dynamic perspective of the estuary, where the landscape constantly changes with the tides. It's an excellent spot for birdwatching and appreciating the region's biodiversity.

Is there a natural monument that combines art and nature?

Yes, the Oma Forest, also known as the Painted Forest, is a unique natural monument where art and nature merge. Artist Agustín Ibarrola painted geometric motifs and figures on tree trunks, using the landscape as a canvas to create an immersive artistic experience. The work has been preserved and moved to a new location to ensure its continuity.

What is the significance of the Urdaibai Biosphere Reserve?

The Urdaibai Biosphere Reserve, where Arratzu is entirely located, is a UNESCO-declared area of high environmental value. It's recognized for its diverse landscapes, rich biodiversity, and outstanding natural and cultural significance. The reserve encompasses estuaries, rivers, karst formations, coastlines, and holm oak forests, making it a crucial protected natural paradise.

What kind of natural features can I expect to see within the Urdaibai Biosphere Reserve?

Within the Urdaibai Biosphere Reserve, you can expect to encounter a wide array of natural features. These include dynamic estuaries and marshlands that change with the tides, winding rivers, unique karst formations, and extensive holm oak forests. The reserve is also home to diverse flora and fauna, making it a prime location for birdwatching and appreciating nature.

Are dogs allowed on trails near Arratzu's natural monuments?

Many trails in natural areas, including those around Arratzu, are dog-friendly. However, it's always recommended to keep dogs on a leash, especially within protected areas like the Urdaibai Biosphere Reserve, to protect wildlife and ensure a pleasant experience for all visitors. Please check local signage for specific regulations at each site.

What do visitors particularly enjoy about the natural monuments in Arratzu?

Visitors appreciate the blend of natural beauty and cultural heritage. The Oma Forest is often highlighted for its unique artistic experience. The Artzubi Bridge is admired for its historical charm and integration into the landscape. The panoramic Views over the Urdaibai marsh are also a favorite for their scenic beauty and wildlife observation opportunities.

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

IbarrangeluBusturiaSukarrietaMundacaBermeoEreñoGautegiz ArteagaKortezubiForuaRigoitiaUrdaibaiEaMuruetaElantxobeGuernica Y LunoAjangizMuxikaNabarnizMorgaMendata

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