Natural Monuments around Arres are characterized by their diverse geological formations and hydrological features. This region, situated in a mountainous landscape, offers a variety of natural attractions including significant waterfalls, high-altitude lakes, and unique valleys. Visitors can explore features shaped by glacial activity and erosion, providing insights into the area's natural history. The landscape supports a range of outdoor activities focused on appreciating these natural landmarks.
Last updated: May 20, 2026
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This lake located at 2339 m altitude is undoubtedly one of the most visited in the Benasque valley, due to its proximity to Llanos del Hospital. 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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The Cascade d'Enfer is a pretty waterfall easily accessible from the car park at the bottom of the Lis Valley.
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The Pish waterfall is one of the most popular waterfalls in the Aran Valley. It is very crowded in the summer season and is ideal for resting and recovering energy.
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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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Amazing natural waterhole that takes the water under the mountains and towards the Aran Valley
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From Vielha, take the N-230 road towards Les and Francia. At approximately five kilometers and at the height of the village of Pont d'Arros, we will turn right to follow a paved forest track for twelve kilometers. The road is in perfect condition but it has significant percentages of unevenness and in some sections it is very narrow and it is advisable to be careful. Every kilometer a sign informs us of the percentage of slope of that section and the height gained.
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The way to the Forau is an easy family friendly hike in the summer months and a fun snowshoe trek in the winter.
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The region around Arres is known for its diverse natural monuments. Among the most popular are Forau de Aiguallut, a unique site where glacial water disappears underground, and Ibón de Gorgutes, a stunning high-altitude lake. Visitors also frequently enjoy the impressive Salto del Pish Waterfall.
The natural monuments around Arres showcase diverse geological formations and hydrological features, largely shaped by glacial activity and erosion. You can witness phenomena like the underground river system at Forau de Aiguallut, high-altitude glacial lakes such as Ibón de Gorgutes, and prominent waterfalls like Salto del Pish Waterfall and Cascade d'Enfer.
Yes, Forau de Aiguallut is considered family-friendly. The tour to this spectacular site is about an hour and a half in total duration, making it accessible for families. Its unique hydrological story also makes it an engaging visit for all ages.
The region offers a variety of outdoor activities. You can explore numerous hiking trails, with options ranging from easy to moderate, such as the Victoria Mine Trail or the Arres Pond loop. For cyclists, there are challenging road cycling routes like the Col du Portillon loop, and gravel biking options including the Arres Viewpoint loop. You can find more details on these activities in the hiking guide, road cycling guide, and gravel biking guide for Arres.
Yes, there are hiking trails for various skill levels. For example, the 'Era Oelha Nera Bar – Es Bòrdes Washhouse loop from Arres' is an easy hike, while the 'Victoria Mine Trail' and 'Arres Pond – Balanza Desaux loop from Arres' are considered moderate. You can find more hiking options and details in the hiking guide for Arres.
Two prominent waterfalls in the area are the Salto del Pish Waterfall in the Aran Valley, known for being a popular resting point, and Cascade d'Enfer, which is easily accessible from the car park at the bottom of the Lis Valley.
The best time to visit Forau de Aiguallut is in spring, after the ice melts. This period allows you to witness the spectacular appearance of the glacial water disappearing into the chasm.
The Salto del Pish Waterfall is accessible via a paved forest track from the N-230 road near Pont d'Arros. The road is in perfect condition but has significant percentages of unevenness and can be narrow in sections, so caution is advised. Signs indicate the slope percentage and height gained every kilometer.
Absolutely. The region around Arres offers excellent opportunities for both road cycling and gravel biking. You can find challenging routes like the 'Col du Portillon, Artiga de Lin, and Mirador d'Arres Loop' for road cycling, or 'Arres Viewpoint – Bossòst loop from Vielha' for gravel biking. Explore more options in the Road Cycling Routes around Arres guide and the Gravel biking around Arres guide.
The Artiga de Lin Valley is considered one of the most beautiful areas of the Aran Valley, characterized by its wild landscape surrounded by rugged mountains. It offers stunning views and a tranquil environment, especially outside the busy summer period.
Visitors particularly appreciate the spectacular natural beauty and the unique geological phenomena. The Forau de Aiguallut, with its disappearing glacial waters, is often highlighted for its special history and visual impact. The high-altitude lakes like Ibón de Gorgutes are also highly regarded for their serene beauty and accessibility.
Yes, Ibón de Gorgutes is a notable high-altitude lake located at 2339 meters altitude. It is a frequently visited natural monument in the Benasque valley, popular due to its proximity to Llanos del Hospital.


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