Best natural monuments around Arrimal are found within Portugal's Natural Park of Aire and Candeeiros Mountains. This region features a karstic landscape with unique geological formations, including dolines, caves, and grottos. The area also contains oak tree forests and lagoons, supporting diverse flora and fauna. These natural features offer opportunities for exploration and outdoor activities.
Last updated: June 29, 2026
Highlight • Waterfall
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Highlight • Cave
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The Fórnea stream originates here, in the Cova da Velha cave, where a natural spring flows almost all year round. However, due to the limestone soil, the water easily infiltrates, traveling through underground galleries instead of flowing freely on the surface. As a result, the stunning Fórnea waterfall only reveals its full grandeur after days of heavy rain.
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The Fórnea Waterfall is located right in the heart of the Serras de Aire e Candeeiros Natural Park, and is fed by the Fórnea Stream, which in turn flows from the Cova da Velha cave.
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Nice quiet route. No water at the waterfall, unfortunately. Because that would give a different experience, certainly worth it for the beautiful views
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Portela do Pereiro Viewpoint. In addition to the swing and the picnic area, since March 2024, the space has a small outdoor gym with eight exercise machines. The sanitary installations are soon to be completed, which will add quality to this space.
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The waterfall only appears after heavy rain! Fórnea waterfall just appear after intense rain!
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Actually, there is supposed to be a waterfall here. Unfortunately dried out due to the drought in July.
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Very cool highlight at the summit. A chilled swing with which you can enjoy the gigantic panoramic view even more. Of course, the whole thing is also a very nice photo highlight. The ascent from the west is easily feasible via a rocky trail. It's quite steep uphill but not a problem if you are fit enough.
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Fornea Waterfall. In the lower part of Fórnea, after a few days of rain, you can enjoy a beautiful waterfall.
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The region around Arrimal, particularly within the Natural Park of Aire and Candeeiros Mountains, is renowned for its unique karstic landscape. You can explore fascinating geological formations such as dolines (sinkholes), an extensive network of caves and grottos, and ancient rock structures of Middle Jurassic origin. These features offer a glimpse into millions of years of geological processes.
For stunning panoramic views, you should visit the Serro Ventoso Swing. This viewpoint offers an expansive vista from the mountaintop, reaching across the valley and, on clear days, even to the Atlantic Ocean and the Berlengas islands. Another excellent spot is the Portela do Pereiro Viewpoint, which also features a picnic area and outdoor gym.
Yes, the Fórnea Waterfall is a must-see. Located in the heart of the Serras de Aire e Candeeiros Natural Park, it is fed by the Fórnea Stream, which originates from the Cova da Velha cave. The waterfall reveals its full grandeur after periods of heavy rain, making it a spectacular sight.
The natural monuments around Arrimal are rich in biodiversity. The oak tree forests and vital lagoons within the Natural Park of Aire and Candeeiros Mountains provide habitats for diverse flora and fauna. The park is particularly known for its significant number of amphibian species, which rely on temporary ponds and lagoons for reproduction.
Yes, several natural monuments are suitable for families. The Fórnea Waterfall is considered family-friendly, especially for walks to see the waterfall after rain. The Portela do Pereiro Viewpoint is also family-friendly, offering facilities like a picnic area and an outdoor gym.
The region offers excellent hiking opportunities. The PR3 Hiking Trail – Serras de Aire e Candeeiros Natural Park provides natural spectacles and panoramic views. For more options, you can explore various routes, including moderate trails like the 'Bezerra Greenway – Path to Bezerra loop' or the 'Olho de Água de Alcobertas loop'. Find more details on hiking around Arrimal.
Absolutely. The diverse terrain around Arrimal is suitable for various outdoor activities. For cycling, you can find routes like the 'Bezerra Greenway – Porto de Mós Greenway loop'. Running enthusiasts can explore trails such as the 'Fórnea Viewpoint loop' or the 'Lua loop'. You can find more routes for cycling and running around Arrimal.
The best time to visit depends on your interests. To witness the Fórnea Waterfall in its full glory, visit after periods of heavy rain, typically in late autumn or winter. For hiking and general exploration, spring and early autumn offer pleasant temperatures and lush landscapes. Summer can be warm, but the caves provide a cool escape.
Visitors particularly enjoy the natural spectacles and panoramic views offered by the region. The unique geological formations, such as the Fórnea Waterfall and the Cova da Velha cave, are highly appreciated. The opportunity to immerse oneself in nature through hiking and exploring the varied terrain also receives positive feedback, with many highlighting the fantastic views from spots like the Serro Ventoso Swing.
While specific accessibility information for all natural monuments is not detailed, the terrain within the Natural Park of Aire and Candeeiros Mountains can be varied, featuring rocky trails and inclines. Some viewpoints like Portela do Pereiro Viewpoint may offer easier access, but it's advisable to check specific trail conditions if mobility is a concern.
The caves and grottos, such as the Cova da Velha cave, are a major draw due to their unique geological formations and their role in the region's hydrology. They are part of an extensive subterranean network that contributes to the area's significant underground water reserves, making it one of Portugal's largest freshwater reservoirs. They offer a fascinating glimpse into ancient geological processes.
Given the varied terrain and potential for outdoor activities, it's recommended to wear comfortable hiking shoes or sturdy footwear. Layers of clothing are advisable, as temperatures can change, especially when exploring caves or at higher viewpoints. If visiting after rain, waterproof gear might be beneficial, particularly for seeing the Fórnea Waterfall.


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