Top 20 Natural Monuments around National Park Posets-Maladeta
Best natural monuments around National Park Posets-Maladeta are characterized by majestic high-mountain landscapes in the Aragonese Pyrenees. The park protects significant natural features, including the last remaining Pyrenean glaciers and numerous glacial lakes known as ibones. Prominent peaks like Aneto and Posets contribute to the diverse natural environment. This region offers a unique opportunity to observe geological history and high-altitude ecosystems.
Best natural monuments around National Park Posets-Maladeta
- The most popular natural monuments is Forau de Aiguallut, a natural monument that showcases a unique hydrological phenomenon where water from the Aneto glacier disappears underground. This site is a well-known tourist attraction due to its spectacular nature and accessibility.
- Another must-see spot is Pico de Aneto Summit, a summit that is the highest peak in the Pyrenees. Visitors can expect challenging terrain and panoramic views from its 3,404 m altitude.
- Visitors also love Estós Valley, a gorge featuring a river flowing through peaks over 3,000 m high. This valley is part of the Posets-Maladeta Natural Park and is a starting point for numerous lakes and peaks.
- National Park Posets-Maladeta is known for its glacial lakes (ibones), high peaks, and glacial formations. The area offers a variety of natural monuments to see and explore, from valleys to summits.
- The natural monuments around National Park Posets-Maladeta are appreciated by the komoot community, with 85 upvotes and 41 photos shared by visitors.
Last updated: July 10, 2026
Forau de Aiguallut
Highlight • Natural Monument
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Pico de Aneto Summit
Highlight • Summit
At the top you will find a gigantic metal cross, a statue of the Virgen del Pilar and a small bust of San Marsial, patron saint of Benasque. Each of them installed by different groups that want to make their own a piece of this colossus that, although it is difficult to believe, went unnoticed for centuries in the shadow of the apparently more prominent Tuca de la Maladeta (from the Occitan "Mall Hita", the 'high peak').
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Estós Valley
Highlight • Gorge
Since 1994 the valley has been part of the Posets-Maladeta Natural Park. Several plant and animal species occur here.
Running along the valley floor is the Estós River, which is the source of numerous gorges and streams from the numerous ibones (glacial lakes), perennial snow and some of Europe's southernmost glaciers.
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Perdiguero Peak
Highlight • Summit
There are two hypotheses about the origin of the name of this fabulous peak:
The first, perhaps alluding to the abundance of this species in other times on the slopes, suggests that it comes from the name partridge.
The second, also considered the most probable, points out that it comes from the deer formation, as there are so many stones in this mountain that some say, in an exaggerated way, that the mountain could be completely dismantled and reduced to nothing pulling stone by stone each of which is part of it.
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Espigantosa Waterfall
Highlight • Waterfall
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Tips from the Community
The highest peak in the Pyrenees mountaineering region.
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The highest peak in the Pyrenees and the one everyone wants to climb. Its demands are more physical than technical, with the exception of the Mahoma Pass, not suitable for those with vertigo, and the Aneto Glacier, which is recommended to avoid in the middle of summer when the hard centuries-old ice is exposed and landslides increase due to melting. At the top you will find a gigantic metal cross, a statue of the Virgen del Pilar and a small bust of San Marsial, patron saint of Benasque. Each of them installed by different groups that want to make their own a piece of this colossus that, although it is difficult to believe, went unnoticed for centuries in the shadow of the apparently more prominent Tuca de la Maladeta (from the Occitan "Mall Hita", the 'high peak').
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Beautiful and powerful waterfall that can be comfortably observed from the Pleta del Estalló, located at about 1,500 meters above sea level. This is also where the bus departing from Eriste arrives in the summer months. You can check the bus schedules at the tourist office or on the website of the town hall.
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Superb view of the impressive Espigantosa waterfall.
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Culminating at 3,222 meters above sea level, the Perdiguère peak dominates a magnificent ridge that includes several peaks exceeding 3,000 meters. Located on the Franco-Spanish border, it dominates the massif of the same name offering an absolutely incredible 360 degree panorama.
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Aneto is the highest peak in the Pyrenees and the second highest in the Iberian Peninsula, with an altitude of 3,404 meters above sea level. It is located in the Posets-Maladeta Natural Park, in the Spanish municipality of Benasque, province of Huesca, autonomous community of Aragon. It is part of the Maladeta massif and, located in the Benasque valley, is made up of Paleozoic terrain of granitic nature and Mesozoic materials. On its northern face, starting at approximately 2810 m, is the largest glacier in the Pyrenees, with about 100 hectares of surface, which is, like many in the world, in clear regression as a consequence of climate change (it is estimates that in the last 100 years it has lost more than half of its surface, and that in 30 or 40 years it may disappear).
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One of the main tributary valleys of the Benasque Valley, which connects with the Chistau Valley to the west and is the starting point for numerous lakes and peaks.
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Tour of just an hour and a half in total duration, essential for anyone who travels to the Benasque Valley for the first time, being probably the most visited place in this valley. The Forau de Aiguallut is a chasm through which the waters from the Aneto glacier disappear to resurface again on the surface in the Val de Arán, in the Garona river basin, which flows into the Atlantic Sea in the French city of Bordeaux.
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Frequently Asked Questions
What unique natural phenomena can I witness in the Posets-Maladeta Natural Park?
You can witness the unique hydrological phenomenon at Forau de Aiguallut, where water from the Aneto glacier disappears into a chasm and later reappears in the Arán Valley. This site is known for its spectacular nature and accessibility.
Are there any family-friendly natural monuments to visit in the park?
Yes, Forau de Aiguallut is considered family-friendly and offers an easy hike. It's a popular spot to see a unique natural spectacle without requiring strenuous effort.
What are the highest peaks I can explore in the Posets-Maladeta Natural Park?
The park is home to some of the highest peaks in the Pyrenees. You can explore the Pico de Aneto Summit, which is the highest peak in the entire Pyrenees at 3,404 meters. Another significant peak is Perdiguero, which culminates at 3,222 meters above sea level and offers an incredible 360-degree panorama.
What kind of glacial features can I find in the Posets-Maladeta Natural Park?
The park is renowned for its glacial past, featuring the Natural Monument of the Pyrenean Glaciers, which protects the last remaining glacier ice caps in the Pyrenees. You'll also find over one hundred *ibones*, or blue water mountain lakes, such as Ibón de Gorgutes, which are pristine remnants of glacial activity.
What outdoor activities can I do near the natural monuments?
The area around the natural monuments offers diverse outdoor activities. You can find numerous routes for gravel biking, cycling, and running. The Estós Valley, for instance, is a starting point for many trails leading to lakes and peaks.
Are there specific hiking trails to reach the natural monuments?
Yes, many natural monuments are accessible via hiking trails. For example, the Estós Valley features a river flowing through peaks over 3,000 meters high and serves as a starting point for numerous lakes and peaks. The path to Forau de Aiguallut is also a well-known route.
What is the best time to visit the natural monuments in Posets-Maladeta Natural Park?
The best time to visit places like Forau de Aiguallut is in spring, after the ice melts, when the water flow is most impressive. For high-altitude peaks like Aneto, summer is generally preferred, though caution is advised on the Aneto Glacier during mid-summer due to exposed ice and increased melting.
What are some of the most beautiful glacial lakes (ibones) in the park?
The park is home to over one hundred *ibones*. Notable examples include the Barbarisa ibones, which offer stunning views with the Prats waterfall and the larger Grande ibón set against the beautiful Barbarisa cirque. Other significant ibones can be found in Vallibierna, Cregüeña, Batisielles, and Remuñe, each offering serene beauty.
What kind of wildlife can I expect to see around the natural monuments?
The high-mountain environment of the Posets-Maladeta Natural Park, particularly around the glacial lakes and valleys like the Estós Valley, supports a diverse array of high-mountain flora and fauna. While specific sightings vary, the pristine nature of these areas provides habitats for various species adapted to alpine conditions.
What do visitors enjoy most about the natural monuments in this region?
Visitors frequently appreciate the spectacular nature and accessibility of sites like Forau de Aiguallut. For mountaineers, the challenge and panoramic views from peaks like Pico de Aneto Summit are highly valued. The serene beauty of the glacial lakes and the dramatic landscapes of valleys like Estós also receive high praise.
Are there any specific regulations regarding activities like swimming in the glacial lakes?
All Aragonese lakes, including the *ibones* like Ibón de Gorgutes, are protected as part of the Inventory of Singular Wetlands. Activities that could modify water quality are prohibited. While bathing isn't explicitly banned, using chemicals like sunscreen, deodorants, or perfumes in the water is understood to negatively affect its quality and is therefore discouraged.
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