Best natural monuments around Sahún are found within the Benasque Valley in the Aragonese Pyrenees. This region features high mountain ecosystems, glacial formations, and pristine lakes. The area is partly within the Posets-Maladeta Natural Park and the Natural Monument of the Pyrenean Glaciers. These protected landscapes offer diverse natural features for exploration.
Last updated: October 5, 2026
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Popular around Sahún
Panoramic Pyrenees – 15 hikers' peaks of over 3,000 metres
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The lake, which I had never heard of before my Pyrenees tour, is obviously a "must see" in this region. Together with the waterfall at the end of the lake, it is also a truly worthwhile hiking destination.
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A legendary mountain pass in the Pyrenees. A crossing point between the Chistau and Benasque valleys, linking Sobrarbe and Ribagorza at an altitude of 2000m.
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Despite being relatively easy to access, this beautiful lake located at 2300 m altitude is not one of the most visited in the Pyrenees. However, it stands out for being located in a very clear glacial cirque, with an almost perfect overexcavation basin. All Aragonese lakes are protected as they are included in the Inventory of Singular Wetlands, so any activity that could modify the quality of their waters is prohibited. While bathing is not specifically mentioned, it is understood that bathing with chemicals on the skin such as sunscreen, deodorants, perfumes or creams is negatively affecting the quality of the water, so it cannot be done. You can read the protection decree and the list of wetlands included here: aragon.es/-/humedales-de-aragon
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Despite being relatively easy to access, this beautiful lake located at 2300 m altitude is not one of the most visited in the Pyrenees. However, it stands out for being located in a very clear glacial cirque, with an almost perfect overexcavation basin. All Aragonese lakes are protected as they are included in the Inventory of Singular Wetlands, so any activity that could modify the quality of their waters is prohibited. While bathing is not specifically mentioned, it is understood that bathing with chemicals on the skin such as sunscreen, deodorants, perfumes or creams is negatively affecting the quality of the water, so it cannot be done. You can read the protection decree and the list of wetlands included here: aragon.es/-/humedales-de-aragon
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Access is via forest tracks in good condition. Obviously, to reach 2000m it takes a little time but the reward is worth it: the views are magnificent over the valleys and peaks at 360 degrees. A delight !
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Beyond the most popular spots, you can discover the impressive Cascada de Espigantosa, a 30-meter high waterfall easily accessible from Eriste, perfect for families. Another enchanting destination is the Ibonet de Batisielles, a small glacial lake nestled in the Estós Valley, offering a serene natural setting amidst towering peaks.
Yes, several natural monuments are suitable for families. The Cascada de Espigantosa is a great option, with a straightforward hiking route from Eriste. The area around Ibón de Plan (Basa de la Mora) also offers relatively easy access compared to other high-mountain lakes, making it a rewarding destination for families to enjoy its striking beauty and local legends.
The region around Sahún's natural monuments is a haven for outdoor enthusiasts. You can find numerous opportunities for hiking, cycling, and mountain biking. For detailed routes, explore the hiking guide around Sahún, the cycling guide, or the MTB trails guide.
The best time to visit largely depends on the activity you plan. For hiking and enjoying the glacial lakes like Ibón de Plan (Basa de la Mora) and Ibonet de Batisielles, late spring to early autumn (June to September) offers the most favorable weather conditions. During winter, some areas, like the upper part of Ardonés Waterfall, freeze, allowing for ice climbing, but access to higher altitude monuments might be challenging due to snow.
Yes, some natural monuments carry rich local folklore. The Ibón de Plan (Basa de la Mora) is famously associated with a legend of a Moorish princess who, according to local tales, can be seen dancing on the water's surface on the night of San Juan by those with a pure heart. Additionally, the Collado de Sahún, a mountain pass, holds historical significance as a traditional route through the mountains.
Absolutely. The region, particularly within the Posets-Maladeta Natural Park, offers numerous challenging routes. For instance, the ascent to Collado de Sahún is quite demanding, especially for cyclists, due to its gravel track and significant altitude gain. Hikers can also find difficult trails leading to high peaks and glacial areas. Check the hiking guide around Sahún for routes like 'From Cascada de Espigantosa to Tuca de Posets'.
The natural monuments around Sahún showcase a variety of unique features. You'll encounter stunning glacial lakes (ibones) like Ibón de Plan (Basa de la Mora) and Ibonet de Batisielles, impressive waterfalls such as Ardonés Waterfall and Cascada de Espigantosa, and dramatic high-mountain scenery within the Posets-Maladeta Natural Park, including the last permanent ice caps in the Pyrenees.
The Estós Valley is a significant natural monument, recognized for its lush forests, the Estós River, and its role as a starting point for numerous lakes and peaks. It's part of the Posets-Maladeta Natural Park and is characterized by its diverse flora and fauna, as well as its impressive gorges and streams fed by glacial meltwater.
Yes, the protected areas like the Posets-Maladeta Natural Park and the Estós Valley are home to diverse alpine flora and fauna. While specific sightings are never guaranteed, these high-mountain ecosystems provide habitats for various plant and animal species, offering opportunities for wildlife observation, especially for birds and mountain mammals.
The Natural Monument of the Pyrenean Glaciers is significant because it protects the dwindling but crucial glacial formations in the Aragonese Pyrenees, including those around Sahún. These glaciers are vestiges of ancient ice masses and are the southernmost permanent ice caps in Europe, offering unique insights into the region's geological history and climate evolution.
Visitors frequently praise the stunning natural beauty and the sense of immersion in untouched landscapes. Highlights like Ardonés Waterfall are popular for their aesthetics and accessibility, while Ibón de Plan (Basa de la Mora) is cherished for its striking scenery and captivating folklore. The overall appeal lies in the dramatic mountain views, pristine lakes, and the tranquility of the Pyrenean environment.
While many trailheads for natural monuments in the Pyrenees are more easily accessed by car, some areas might have limited public transport options, especially during peak season. It's advisable to check local bus schedules to nearby towns like Benasque, from which you might find connections or be able to arrange local transport to specific starting points for monuments like Cascada de Espigantosa or trails leading into the Estós Valley. Parking is generally available near popular trailheads.


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