Castle of Romanesque and Gothic architecture, with quadrangular towers. The keep is on the hillside more phantasmic Shap. Medieval doors only if conserves of mercy, on the Guadiana river. The ancient Citadel, as well as important sections of the wall that surrounded the population, are still preserved. Archaeological work carried out in the Citadel of the Castle uncovered a Moorish quarter of centuries XII\/XIII, and various Roman structures of the 4th century. The Arab ceramic pieces found are exposed in the core of the Museum of Mértola.

After serious problems caused by the Castilian domination, d. Dinis gave the order of Aviz Noudar, forcing her to build a strong Castle and granting the town many privileges. Thus, the castle was built in 1308, by order of d. Br. Afonso, master of the order of Aviz, and suffered over the centuries various repairs. Consists of hexagonal wall and fence, reinforced by the cubelos regular spaces, with two gates defended by two barbicans and two shutters. Recently, have been undertaken several archaeological investigations, with a view to the integration and rehabilitation of the origins of this fortification.

This castle was one of the best defensive walls of border. Currently, there are only some doors, wall panels and towers that Crown the top of the mountain. By the door spring also remain several anthropomorphic graves. His plan featured a irregular configuration, almost no battlements and with three doors (to the West, the arc and the de São Pedro), a watchtower and four towers.

Fortified village, where only the walls and, inside, remains of dwellings.

Castle rebuilt by King Denis in 1310, undergoing restoration in the 18th century. The former fortification, situated high on a hill stands just a few pieces of wall and turrets, in addition to the seventeenth century fortifications, with cliffs, parapets and ravelins, built during the war of restoration. Highlights include the Igreja de Nossa Senhora da Graça, gabled façade, framed straight Dick portal and oculus. This castle is a characteristic example of border strongholds of the lowland regions, with bastions system determined by artillery pirobalística.

Built by King Dinis, there are currently traces and remains of the old castle, around two meters high. Being an important historical testimony, you can see the strong citadel and a walled enclosure.

The castle walls remain, two doors (of the village and the Santarém) and some towers. The old Palace is a monumental residential tower of the 15th century. Plant composed of rectangular main body and two turrets inserted on the wall of the village. The curtain wall that unites the turrets, crowned by way of round, is torn by arched door broken abroad, down inside. Without cover, are visible in the interior, where Corbels supporting the beams of the floors and ceilings. Still inside the enclosure, there is a large cistern. The Muslim Castle would have been conquered by the King …

The fortress stands on the eastern spur of Serra da Arrábida, from which you can see an extensive landscape from Sines to Sintra. Its main points of interest are the entrance, the 17th century walls, the convent of the Order of Santiago, the church of Santiago, from the 15th century, the Paços de D. Jorge, the turrets, the 14th century keep, the ruins of the church of Santa Maria, the parade ground and several portals. There is also the Castle Nucleus, one of the museum spaces of the Palmela Municipal Museum.

Ruins of a medieval castle that was the siege of the "Julgado of Penafiel de Sousa". On a rock, at the top of the castle, there is a sculpture of a warrior. Pre-historic paintings were found here.

It is a military monument of great beauty, classified as a National Monument since 1910. It dominates the landscape from a height of 930 meters, in the middle of Serra de Serigo. Built in the 14th century, its current construction is probably the result of 16th century alterations to the original medieval castle. It is a citadel with a triangular plan and a door flanked by two turrets, with small balconies above, supported by corbels and crowned with prismatic battlements. Inside the small castle, there is not much to see, but the magnificent landscape that surrounds it is more than …