Best natural monuments around Ereño are found in this mountainous municipality in the Basque Country, situated between Gernika-Lumo and Lekeitio. The area offers diverse natural attractions, including sites of geological significance and locations with panoramic views. Ereño natural attractions provide opportunities to explore its unique natural formations and mountainous terrain. The region is known for its rich natural heritage, making it a notable destination for outdoor exploration.
Last updated: July 1, 2026
Highlight • Bridge
Translated by Google •
Tip by
Highlight • Natural Monument
Translated by Google •
Tip by
Sign up now to discover places like this
Get recommendations on the best single tracks, peaks, & plenty of other exciting outdoor places.
Sign up for free
Highlight • Forest
Translated by Google •
Tip by
Highlight • Viewpoint
Translated by Google •
Tip by
Highlight • Natural Monument
Translated by Google •
Tip by
Sign up for free to discover even more natural monuments around Ereño.
Sign up for free
Already have an account?
Start today with a free account
Your next adventure awaits.
Login or Signup
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.
1
0
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.
0
0
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.
1
0
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.
1
0
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.”
1
0
Gernikako Arbola is an oak tree in the Basque city of Gernika.
2
3
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.
1
0
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/
0
0
Visitors frequently enjoy the unique artistic experience of Oma Forest, where painted tree trunks create an immersive art and nature display. Another beloved spot is the Artzubi Bridge, a 16th-century Romanesque structure beautifully integrated into its natural surroundings. The Views over the Urdaibai marsh also offer incredible, ever-changing landscapes.
Ereño boasts several other significant natural features. The Urdaibai Biosphere Reserve itself is a vast and varied natural space, recognized by UNESCO. You can also visit the site of the San Miguel de Ereñozar hermitage, which, at 448 meters above sea level, provides spectacular panoramic views of the Mundaka estuary, Gorbeia peak, and coastal towns. The area is also known for its ancient marble quarries, such as Cantera Gorria, which showcase significant geological and mining heritage.
Yes, Ereño offers various hiking opportunities to explore its natural beauty. For instance, you can find routes like the 'Visitor center – Oma Forest loop' or the 'San Miguel Trail (Ereño) loop' which are considered easy to moderate. Many trails allow you to discover sites like the Oma Forest and the Artzubi Bridge. You can find more details on hiking routes in the area on the Hiking around Ereño guide.
Ereño is a mountainous municipality, so trails often involve varied terrain. While some routes, like parts of the San Miguel Trail, are relatively easy, others can be moderate or difficult, featuring elevation changes typical of a hilly landscape. The region's geological history, including its marble quarries, also contributes to a diverse natural environment.
The Oma Forest, also known as the Painted Forest, is a unique artistic creation by Basque artist Agustín Ibarrola. It's an expression of the Art and Nature movement, where tree trunks are painted with geometric motifs and figures. The artwork plays with perspective and depth, requiring visitors to move and discover different compositions, making it an interactive and immersive experience within a natural setting.
Absolutely! The Oma Forest is considered family-friendly, offering an engaging and interactive experience for all ages. The Views over the Urdaibai marsh also provide a beautiful and accessible spot for families to enjoy nature. Additionally, the Urdaibai Biosphere Reserve offers a wide range of activities suitable for families, from gentle walks to birdwatching.
Ereño's natural landscape is rich with history. The Artzubi Bridge is a 16th-century Romanesque bridge that is part of the Camino de Santiago. The region's marble quarries, exploited since Roman times, are also significant cultural and geoheritage sites, with the 'Red Ereño' marble having been used in numerous historical buildings. The Old Tree of Gernika, while not directly in Ereño, is a historically significant natural monument nearby, representing Basque liberties.
Yes, there are several cycling routes that allow you to explore the natural surroundings of Ereño. Options range from moderate to difficult, such as the 'Tour of Biscay: Urdaibai Coast Loop' or the 'Lekeitio – Arteaga Castle loop'. These routes often pass through scenic areas and offer views of the natural monuments. You can find more information on cycling routes in the area on the Cycling around Ereño guide.
The best time to visit Ereño's natural monuments generally depends on your preferred activities. Spring and autumn offer pleasant temperatures for hiking and cycling, with lush greenery or vibrant fall colors. Summer is ideal for enjoying the coastal aspects of the Urdaibai Biosphere Reserve, though it can be busier. Winter can offer a different, quieter beauty, but some trails might be more challenging due to weather conditions.
Ereño is particularly known for its geological significance, primarily due to its ancient marble quarries. The 'Red Ereño' marble, quarried here since Roman times, is globally recognized for its unique qualities. Sites like Cantera Gorria offer insights into paleontological, petrological, geomorphological, and tectonic features, making it a fascinating area for those interested in geology and geoheritage.
Visitors consistently praise the unique blend of art and nature found in the Oma Forest. The historical charm of the Artzubi Bridge, with its well-preserved Romanesque architecture amidst natural beauty, is also highly appreciated. The dynamic and breathtaking landscapes offered by the Views over the Urdaibai marsh, which change with the tides, are also a major highlight for many.


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