After the Mondego, this is the second-longest Portuguese river. It rises in the Serra da Estrela, at an altitude of approximately 1,900 meters, and stretches for 242 km. Its main tributaries are the Nabão and Alge rivers, as well as the Isna, Paul, Bogas, Pera, and Unhais streams. It flows into Constância. Thanks to its water potential, flow, steepness, and rocky banks, it has been used for electricity generation.

Gravity dam on the Ave River. The reservoir is particularly pleasant, resembling a mountain lake.

Located in the heart of the Serra da Cabreira, among magnificent steep rocks, the Salamonde dam allows for the practice of sports with restrictions. It is a vault-type dam on the Cávado River.

A geological formation formed by water over a rock. Of great natural beauty, it's the ideal place to take some photographs.

The Alviela River headwaters complex includes the Alviela Science Center, a campsite, a river beach, and a walking trail with information.

This phenomenon, rare in Portugal, is found in the Serras de Aire e Candeeiros Natural Park. In this depression, nicknamed Lagoa de Minde, the lake is larger in winter, thanks to underground galleries that overflow with water. It measures approximately four kilometers by 1,800 meters and is about 195 meters deep.

Gravity dam located on the Pônsul River in the Tagus River Basin, near a narrow granite gorge above the Idanha-a-Nova Campinas. The most common fish species are largemouth bass, barbel, boga, carp, and bordalo.

A small artificial lake, surrounded by pleasant green areas.

The Monfortinho Thermal Baths have been known since Roman times, thanks to the purity and therapeutic properties of the waters from the Serra de Penha Garcia springs, which are recommended for dermatological conditions and disorders of the digestive, circulatory, respiratory, and psychosomatic systems. Recently renovated, the thermal baths offer a range of personalized treatments, in addition to a gym, solarium, and physiotherapy pool.

A mixed dam, part gravity and part arch, fed by the Rabagão River, belonging to the Cávado River Basin. Completed in 1964, it stands 94 meters high and 1,897 meters long at the crest, with a maximum discharge capacity of 500 m3/s. It is the second-largest dam in Portugal, after the Alqueva Dam, and is highly sought after by fishermen. Other sports and leisure activities, such as surfing and motorboating, are also permitted.