On one of the banks of the Vouga River, next to the new thermal baths of São Pedro do Sul, lies one of the oldest Roman thermal baths, making it one of the most important archaeological monuments from this period. It is a Roman thermal area composed of a tepidarium, a caldarium, a sudatorium, and a laconicum (dry greenhouse), comprising a set of five pools. It is also known as the Dom Afonso Henriques Pool.

The Reriz Palace was built in the 18th century and is characterized by its grated facades and stonework. The main facade features four rectangular windows, dominated by broken pediments and protected by grated balconies. The manor's gardens are located in the inner courtyard.

A former monastery founded in 1725 to serve as a hospital and hostel for the friars of the Third Order who used the thermal baths. The convent area consists of the temple, cloister, and monastic outbuildings. Of the former monastery, only the church remains, with the interior featuring tiles and the image of the Virgin and Child. It has a working carillon and is occasionally open for classical music and traditional regional music concerts.

The hillfort is located midway up the slopes of the Serra da Arada, covering an area of ​​over seven hectares and rising 610 meters above sea level. Carvings of the basic rock art typology of the Northwest Peninsula were discovered, concluding that it was inhabited between the 7th century BC and the 4th century AD. Remains of over 25 houses with circular, oval, and rectangular plans remain. The settlement was defended by a triple wall with a perimeter of 660 meters.

Church with a stepped plan consisting of a nave and a narrower chancel, with the sacristy to the right.

This fort, built by Philip III in 1603, is located on Pessegueiro Island, south of Porto Covo. During the Restoration War, this fortification suffered several Castilian attacks and was severely damaged. At the end of the 17th century, during the reign of King Pedro II, a new fort was built, which currently lies in ruins.

The main building of the Sines Museum and the Vasco da Gama House, located in the castle's inner buildings, were inaugurated in 2008. The main building houses an exhibition dedicated to the 20th century in Sines, as well as some archaeological collections. Some parts of the facilities dedicated to Vasco da Gama are of great interest, including his biography, the house where he lived, and his role in Portuguese maritime history.

This historic building was rebuilt in 1585 by King Felipe I and converted to cultural use in 1990. The museum includes pieces from the Paleolithic to the Baroque. Its main collection is the punic treasure of Gaio.

It was here that, at the age of 11 or 12, Vasco da Gama, along with three of his brothers, received his prima tonsure and became a member of the Order of Santiago. In the 18th century, the medieval church, already too small for the number of believers who wanted to attend Mass, required extensive remodeling, giving it its current appearance, typical of the Joanine Baroque.

This 16th-century chapel preserves the Manueline portal and inscribed tombstones on its main façade. On both sides are buttresses, topped by conical pinnacles, supporting the coffered vault covering the chapel's single nave. The walls are covered in 18th-century tiles. It has a single nave and a chancel with star-shaped vaults supported by corbels, Manueline decorative elements on the clasps, vault-flush corbels, and also on the portal.