Best natural monuments around Somiedo showcase the region's unique geological and ecological value within Asturias, Spain. This UNESCO Biosphere Reserve and Natural Park is characterized by its rugged mountains, glacial valleys, and diverse ecosystems. The area offers a variety of natural features, from expansive lake complexes to ancient trees, providing opportunities for exploration and appreciation of its well-preserved environment. Its landscape is a result of Quaternary glacial processes, creating distinct landforms and supporting rich biodiversity.
Last updated: May 4, 2026
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The pass is now paved and can be driven on by car.
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During the mining era, this pass served as a discreet link between mines on either side, and minimal traces of old cart and mule traffic remain, though they don't coincide with the current road. From above, the wind is almost constant, and the view towards the Saliencia lakes has that air of a "natural viewpoint" before the term even existed. It's perfect to mark on Komoot as a key point on your route due to its spaciousness, its somewhat hidden history, and its character as a natural border.
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Puerto de Ventana is a mountain pass located in the Cantabrian Mountains, between the Principality of Asturias and the province of León. It lies at an altitude of 1,587 meters and connects the municipality of San Emiliano in León with the Asturian municipality of Teverga. From the pass, you can enjoy a breathtaking view of the San Emiliano Valley, known as Babia de Yuso.
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Beautiful port with very very hard climbs on both sides.
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Impressive views, both for Leonese lands and Asturian lands. The climbs on both slopes are very difficult, but spectacular, and are worth it.
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Beautiful place, hard to get to, worth it. Surrounded by mountains.
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Impressive cave that is located in a strait where Monte el Miru and the Cueva Huerta mountain have created a gorge where the cave is located at their feet. It's worth stopping by to see this big hole in the rock.
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One of the most well-known mountain passes in Spanish cycling but on foot, it offers good views of the plumbing area between Castilla and Asturias.
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Somiedo offers a variety of outdoor activities centered around its natural monuments. The Lake of the Valley and the wider Somiedo Lake Complex are excellent for hiking, with routes of varying difficulty for summer walks or winter snowshoeing. For cycling, the Bear Trail, an old mining railway, offers impressive views through tunnels and canyons. You can also explore trails like the Ricabo Track, which provides scenic views of the Quirós and Teverga Valleys.
Yes, Somiedo has options suitable for families. The Lake of the Valley is noted as family-friendly, offering beautiful scenery. The Bear Trail is also a popular family-friendly cycle path, following an old railway line through picturesque landscapes.
The Somiedo Lake Complex, a designated Natural Monument, showcases remarkable geological features resulting from Quaternary glacial processes. You can observe glacial cirque lakes, valleys, and calcarenite massifs with typical erosion forms like dolines, uvalas, poljes, and lapies fields. Additionally, the Huerta Cave offers a chance to explore one of the largest Asturian cavities.
The Somiedo Lake Complex is ideal for hiking during summer, while winter offers opportunities for snowshoeing. The high mountain areas can be quite rugged. Generally, late spring to early autumn (May to October) provides the most favorable weather for exploring the trails and enjoying the natural beauty, with lush landscapes and accessible routes.
Yes, the Somiedo Lake Complex is rich in biodiversity. The surrounding mountains are home to the Cantabrian brown bear, and you might spot golden eagles and Egyptian vultures. The wetlands are particularly rich in amphibians, which serve as a food source for otters living in Lago del Valle. The area provides a unique opportunity to observe diverse high-mountain fauna.
While not within Somiedo Natural Park itself, the **Tejo de Pastur** in the municipality of Illano is a magnificent and ancient yew tree. This centenarian tree holds significant cultural and magical importance in popular belief, often found near hermitages and chapels, making it a unique natural and cultural landmark in Asturias.
The Ventana Pass, located at 1,587 meters, offers breathtaking panoramic views of the San Emiliano Valley (Babia de Yuso) and serves as a passage between León and Asturias. The high mountain areas separating the lakes within the Somiedo Lake Complex, such as the Picos Albos, also provide stunning vistas of the contrasting mountains and water bodies.
Yes, the Somiedo Lake Complex offers multiple routes of varying difficulty, including more challenging options for experienced hikers. The rugged terrain and significant elevation changes, particularly around the glacial lakes and high mountain passes like Ventana Pass, provide demanding trails. The Ricabo Track also features leading percentages at the beginning and harder, looser terrain towards the end.
The lakes and surrounding small peat bogs within the Somiedo Lake Complex host valuable aquatic plant communities, including threatened species like shrubby cinquefoil and variegated horsetail. In less humid, high-altitude areas, you'll find pastures dominated by heathlands, creeping junipers, and bearberry, showcasing the diverse flora of this well-preserved environment.
The natural monuments in Somiedo, particularly the Somiedo Lake Complex, are crucial for their ecological value. They are recognized as a UNESCO Biosphere Reserve and Natural Park, preserving unique glacial landscapes and diverse ecosystems. The area provides habitats for endangered plant species and a rich variety of fauna, including the Cantabrian brown bear, golden eagles, and numerous amphibians, making it a vital area for conservation and scientific interest.


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