Built by Dom João IV in 1647, this fortress belonged to the defensive system of the Tejo's inlet. Throughout the centuries it was several times occupied and adapted, gaving been a post of the fiscal guard, a centre of juvenile sailing and a youth hostel.

This fortress, built in a strategic point that allowed a dominance of the inlet's entrance, was one one of the most important Portuguese war fortresses. Inspired by the 1500s Italian model, it is one of the better preserved fortresses. A special note to it terraces, domed casemates and the cistern.

Basilica located on Monte de Santa Luzia, built in the 19th century, with a project by Ventura Terra, of Romanesque-Byzantine inspiration, according to the preference for classical models, typical of the time. Some authors identify the architectural language used in this building with the Sacré-Coeur, in Paris.

A National Monument built in the second half of the 18th century. This building, in the "pombalino" (time of the Marquis of Pombal) style, was a recreation farm for the Marquis of Pombal and family. A special note to the chapel with 18th century paintings, th tiles in the intrior and outsid the building, two 18th century statues by Machado de Castro and the waterfalls in the gardens.

The heart of Viana is, quit probably, the most well known work in this museum devoted to the History of Traditional Jewelry in Portugal.

This museum illustrates the history of the Fábrica da Pólvora de Barcarena (Barcarena's Gunpowder Factory) and simultaneously documents the methods used in manufacturing gunpowder and the energies used during the 500 years the factory remained open.

Wall belonging to a Gothic Castle, where you can still see a pre-Romanesque cross.

Prehistoric rock shelters, where they are visible traces of parietal representations. It has about 150 m2 of area and only 45 inches of average height. It is decorated with five series of parietal insculturas which is believed to date from two different periods: the first one around 1500.C. and the second in the Bronze age.

Medieval bridge Plan Board with a maximum width of four metres, based on three broken arches unequal, being the central arch. Also features two hoist high seas and masonry guards, knotted schist granite ashlars. Located on the Fresno River, is part of an ancient road that connected Miranda do Douro the two churches. The medieval primitive building was rebuilt in the 18th century.