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Leiria

Porto De Mós

Top 20 Natural Monuments around Porto De Mós

Natural monuments around Porto De Mós are primarily found within the Parque Natural das Serras de Aire e Candeeiros, an area characterized by its unique karst landscape. This region features impressive limestone hills, cliffs, and an intricate underground network of caves. These sites offer a glimpse into the region's rich natural history and provide remarkable visitor experiences. The landscape is known for its geological formations, including significant cave systems and the source of the Lis River.

Best natural monuments around…

Last updated: May 26, 2026

Source of the Lis River

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headwater of the Lis river, a river that cross the city of Leiria and flows into Praia da Vieira. An amazing place to visit during the winter and after some …

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Fórnea Waterfall

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Waterfall and Fórnea, beaatifull place to go by wike, or walking with the family, specially after some rains, to see the waterfall with water

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It was more by chance that we came across the hiking trail PR3. A very nice tour with many natural spectacles. However, we started from the parking space in Sao …

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Pia da Ovelha Cave

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Pia da Ovelha, point of interest inserted in the PR2 BTL trail

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Serras de Aire e Candeeiros Natural Park

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Get ready to climb the mountain, enjoy the landscape to Torres Novas on your right.

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𝘼𝘾 🏕️
March 30, 2025, Nascente do Rio Lis

The Lis River, whose source is in the town of Fontes, Cortes, is one of the few rivers in the country whose current flows from south to north and, in the final kilometres, from east to west. In winter and early spring, it is possible to see water emerging from the ground in surprising quantities. In the summer months, the source is usually dry.

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The Sheep's Sink is an imposing natural cavity, named after the sink carved under a stalactite that, in the rainy months, pours out abundant water. In the past, this natural refuge served as a drinking trough for cattle.

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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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The waterfall only appears after heavy rain! Fórnea waterfall just appear after intense rain!

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I recommend it to cyclists who want to push the limits.

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Erik
July 10, 2023, Fórnea Waterfall

Actually, there is supposed to be a waterfall here. Unfortunately dried out due to the drought in July.

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While the spring itself is dry in summer it must be spectacular when the rains are back in November. But the Rio Lis is also fed by water coming from inside the mountain and ground-water from the area, so water starts flowing a few hundred meters further down the riverbed, nice and fresh. There is a lovely path following it, and those who did some walking on a lovely summers day will really enjoy a little dip, maybe some swimming, but at least a bit of wading through it. There is easy access in several places, have fun 😀!

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Frequently Asked Questions

What are some of the most impressive cave systems to visit in the Porto de Mós region?

The region is renowned for its extensive cave systems. The Grutas de Mira de Aire are the largest in Portugal, offering a stunning descent into illuminated stalactite and stalagmite formations. Other notable caves include the Grutas de Santo António and Grutas de Alvados, all showcasing the unique karst landscape of the area.

Are there family-friendly natural monuments around Porto de Mós?

Yes, several natural monuments are suitable for families. The Source of the Lis River is a fascinating spot, especially after heavy rains, where water emerges from the earth. The Fórnea Waterfall is also a beautiful place for a family walk, particularly when the waterfall is active. Many of the cave systems, like Grutas de Mira de Aire, offer guided tours that are educational and engaging for all ages.

What unique geological features can I explore in the natural monuments of Porto de Mós?

The region is characterized by its karst morphology, featuring impressive limestone hills, cliffs, and an intricate underground network. You can explore vast cave systems with stalactites and stalagmites, witness the unique phenomenon of the Source of the Lis River, and marvel at the Fórnea, a massive natural amphitheater carved into limestone.

What outdoor activities can I do near the natural monuments in Porto de Mós?

The area offers a variety of outdoor activities, primarily hiking and cycling. You can find numerous trails within the Serras de Aire e Candeeiros Natural Park. For hiking, there are routes like the 'Fórnea Waterfall – Fornea Waterfall loop from Alcaria' which is an easy 3.7 km trail. For cycling, options range from easy greenway loops to more challenging routes. You can explore more options in the hiking guide or cycling guide for Porto de Mós.

Are there hiking trails suitable for beginners in the natural monuments area?

Yes, there are options for beginners. For example, the 'Fórnea Waterfall – Fornea Waterfall loop from Alcaria' is an easy 3.7 km hike. Many sections of the Serras de Aire e Candeeiros Natural Park offer less strenuous paths, allowing visitors to enjoy the landscape without significant difficulty. Always check specific trail details for elevation and terrain before starting.

What wildlife can I expect to see in the natural monuments around Porto de Mós?

The Parque Natural das Serras de Aire e Candeeiros is a protected area rich in biodiversity. It's home to over 100 bird species and 18 bat species, which are a symbol of the park. While surface water is scarce, the unique karst environment supports diverse flora, including around 600 plant species like wild orchids.

Is there a natural monument in the region related to dinosaurs?

Yes, although slightly outside the immediate vicinity of Porto de Mós, the Monumento Natural das Pegadas de Dinossáurios (Dinosaur Footprints Natural Monument) is a significant site. It features the world's largest and most important collection of sauropod dinosaur footprints from the mid-Jurassic period, offering a fascinating glimpse into prehistoric life.

What is the Fórnea Waterfall and Amphitheater?

The Fórnea is a unique geological structure located in the heart of the Serras de Aire e Candeeiros Natural Park. It's a massive 250-meter-high amphitheater, 500 meters in diameter, carved into limestone. The Fórnea Waterfall, fed by the Fórnea Stream, flows within this impressive natural formation, especially after rainfall, offering magnificent panoramic views and hiking opportunities.

What do visitors enjoy most about the natural monuments in Porto de Mós?

Visitors frequently praise the stunning geological formations, particularly the intricate cave systems and the unique karst landscape of the Serras de Aire e Candeeiros Natural Park. The peaceful atmosphere, opportunities for hiking, and the chance to witness natural phenomena like the Source of the Lis River are also highly appreciated. Many enjoy the blend of natural beauty and educational experiences.

What is the best time to visit the natural monuments around Porto de Mós?

The natural monuments, especially the caves, maintain a constant temperature (around 17-18°C) year-round, making them suitable for visiting in any season. For outdoor activities like hiking and enjoying waterfalls (such as the Fórnea Waterfall), spring and autumn offer pleasant temperatures and often more active water flows after seasonal rains. Winter can also be rewarding for seeing the Source of the Lis River at its most abundant.

Are there any hidden natural monuments worth discovering in the Porto de Mós area?

While not 'hidden' in the sense of being unknown, sites like the Pia da Ovelha Cave offer a more rustic and less commercialized experience compared to the larger cave systems. This imposing natural cavity, known for its sink carved under a stalactite, historically served as a drinking trough for cattle and provides a glimpse into the region's pastoral heritage within its natural wonders.

Are there wheelchair accessible trails at the natural monuments in Porto de Mós?

While many natural monuments in the region, especially the cave systems, involve stairs and uneven terrain, some areas within the Serras de Aire e Candeeiros Natural Park may offer more accessible paths. It is advisable to check specific accessibility information for each site, particularly for the major cave attractions, as their natural formations often present challenges for wheelchair users.

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

São Martinho Do PortoAlcobaçaFamalicãoCelaFerrelAtouguia Da BaleiaPenichePataiasBárrioMaiorgaVestiariaNazaréCozValado Dos FradesNazaréAlpedrizPeniche (Ajuda)AmoreiraSerra D' El-ReiÓbidosSão MamedeOlho MarinhoPorto De Mós (São Pedro)Caldas Da RainhaAlqueidão Da SerraCalvaria De CimaPorto de Mós - São João Baptista e São PedroMontesMira De AireBatalhaReguengo Do FetalJuncalPedreirasSão BentoAlcariaAlvadosBatalhaFigueiró Dos VinhosAljubarrotaSerro VentosoSerras de Aire e Candeeiros Natural ParkNational Park Serras Aire e CandeeirosArrimal e Arrimal e Arrimal e MendigaTornadaAljubarrota (São Vicente)VauPeniche (Conceição)ArrimalCastanheira De PêraPedrógão GrandeCastanheira De PeraBombarralCampeloAlfeizerãoAlcobaçaSalir Do PortoSerra Do BouroCotoFoz Do ArelhoNadadouroCaldas Da Rainha (Santo Onofre)Bombarral e Vale Covo e Vale Covo e Vale CovoÉvora De AlcobaçaÓbidos (Santa Maria)GolpilheiraSalir De MatosPedrógão GrandeSobral Da LagoaPombalCortesSanta Catarina da Serra e ChainçaChainçaCaldas Da Rainha (Nossa Senhora Do Pópulo)CoentralAnsiãoArrabalBarreiraSanta CatarinaCarvalhal BenfeitoTurquelAlvaiázereÓbidos (São Pedro)Torre De Vale De TodosVimeiroFigueiró dos Vinhos e BairradasAzoiaAlvorgeCarvalhalBeneditaMaceiraPousosAgudaVila FacaiaAnsiãoRoliçaA Dos NegrosVale CovoAvelarLagarteiraLandalGraçaPousafloresPussos

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