Natural monuments around Plan encompass a diverse landscape, characterized by mountainous terrain and significant natural features. This region offers a variety of natural formations, including high-altitude lakes, powerful waterfalls, and panoramic mountain summits. Visitors can explore these sites, which are integral to the area's natural heritage. The guide features 19 natural monuments, providing opportunities for outdoor exploration.
Last updated: November 1, 2026
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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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The Bellós River pools are small, crystal-clear pools formed between rocks, where the river calms and creates natural pools. A perfect spot to cool off and enjoy the wild beauty of the Pyrenean surroundings.
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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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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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The region around Plan offers diverse natural monuments. You can visit the Ibón of Plan (Basa de la Mora), a high-altitude lake known for its folklore. Another impressive site is the Espigantosa Waterfall, a powerful cascade easily viewed from Pleta del Estalló. For panoramic views, consider the challenging ascent to Picón d'O Libro (Summit of Peña Montañesa).
Yes, the Ibón of Plan (Basa de la Mora) is steeped in local folklore. A legend tells of a Moorish princess who drowned in the lake, and tradition says that on the night of San Juan, those with a pure heart can see her dancing on the surface if they wash their faces with the lake's water. Additionally, Collado de Sahún is recognized as a historical site.
The natural monuments around Plan offer spectacular views. From Picón d'O Libro (Summit of Peña Montañesa), you can enjoy panoramic vistas of the main Pyrenees mountain range. Collado de Sahún provides views of prominent peaks like Aneto, Posets, Robiñera, Monte Perdido, and Eristes. Even the Espigantosa Waterfall offers superb and impressive views of the cascade itself.
Yes, the Espigantosa Waterfall is considered family-friendly. It can be comfortably observed from the Pleta del Estalló, and during summer months, a bus from Eriste provides easy access to the site.
The Plan region is rich in diverse natural features. You can explore high-altitude lakes like the Ibón of Plan (Basa de la Mora), powerful waterfalls such as the Espigantosa Waterfall, and majestic mountain summits like Picón d'O Libro (Summit of Peña Montañesa). Additionally, you can discover crystal-clear river pools, like the Bellos River Pools, perfect for cooling off.
Accessibility varies by monument. The Espigantosa Waterfall is quite accessible, with a bus service from Eriste available in summer. The Bellos River Pools are located a few meters from the road, though some sections may require descending to river level. Other sites like Collado de Sahún and Picón d'O Libro (Summit of Peña Montañesa) involve challenging ascents.
The best time to visit depends on the specific monument and activity. For high-altitude lakes like the Ibón of Plan (Basa de la Mora), it fills up after the winter thaw, suggesting late spring to early autumn. Summer months are ideal for enjoying the Bellos River Pools and accessing sites like Espigantosa Waterfall via bus service. Generally, the warmer months offer better conditions for exploring the mountainous terrain.
While not entirely hidden, the Bellos River Pools offer a serene and wild beauty. These crystal-clear pools, formed between rocks where the river calms, provide a perfect spot to cool off and enjoy the Pyrenean surroundings, often requiring a short walk from the main road.
The region around Plan is excellent for outdoor activities. You can find numerous hiking opportunities, including trails around the Ibón of Plan (Basa de la Mora). For more challenging adventures, there are mountain hikes to summits like Posets. Road cycling routes are also available, such as the Pineta Valley from Bielsa. Explore more options in the Hiking around Plan, Mountain Hikes around Plan, and Road Cycling Routes around Plan guides.
Yes, there are many hiking trails. For example, you can find trails leading to the Ibón of Plan (Basa de la Mora), with options ranging from moderate to difficult, including a 3.3 km trail directly to the Ibón. The ascent to Picón d'O Libro (Summit of Peña Montañesa) is also a challenging but rewarding hike. You can find more details on various routes in the Hiking around Plan guide.
Visitors frequently praise the stunning panoramic views, especially from mountain passes and summits like Collado de Sahún. The powerful beauty of cascades like the Espigantosa Waterfall is also a highlight. Many appreciate the wild and pristine nature of places like the Bellos River Pools, offering a refreshing escape. The region's natural heritage and opportunities for outdoor exploration are highly valued.


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