The plan of the castle is an irregular Pentagon. Features a thick wall and is reinforced in every angle with a tower. Four of the five towers were restored. The main façade is torn by a round arch, which provides access, through a domed, the entrance door, with bow down inside. On the second floor there is a double-drill arcade loggia, based on oitavados and pillars in inverted cone shaped Corbels, with an arched window broken on Corbels, on each side. Has four vaulted rooms that open onto a central courtyard with cistern in half, preceded by pilasters and classicizantes …

Construction of military protection is located in a hilly location with a stunning panoramic view. The remains of several types of construction in the Tower proved their longevity. It houses the Museum of the castle of Lanhoso.

Despite the poor state of conservation and corresponding asset value, little castle of Santa Cruz or the arches has great historical significance and regional scientific interest enough for understanding the Organization and evolution of medieval settlement in the Minho region.

This castle, which dominates the town, has a rectangular plan and its foundation is attributed to the Islamic period. Definitely conquered from the Moors in 1217, King Afonso II ordered the construction of a castle there, which he donated to the Order of Santiago. Over time, and due to its loss of military function, it began to deteriorate. Within the wall are remains of the citadel, a cistern, and other buildings.

This fortress was built by Sancho I, having been restored during the reign of King Dinis. The castle remains, at present, the keep with twinned Windows and crowned by battlements polygonal. Over the centuries this site received several fortifications.

At the foot of the Serra do Larouco, among o Corgo o Corgo and do Fojo of the Goatherd, 1090 ft maximum altitude is a rugged Hill that was once a fortified settlement of pre-Roman times. For the whole lot are visible remnants of alignments of structures, with higher incidence on the upper deck, where you will find the highest concentration of ceramic materials. There are also remains of walls. Of North and Northwest defence was natural. Iron age fortified settlement, taking into account the ceramic booty found.

This castle was built by King Dinis between the 13th and 14th centuries. Some of the walls that surrounded the old town remain from the original construction. The area where the wall existed is currently occupied by housing.

The castle was built during the reign of Dom Sancho I, on the ruins of an older fortification. During Dom Fernando's reign, it underwent restoration work and, in 1755, suffered extensive damage in an earthquake. Later, French invaders left the castle in a state of great degradation, which led to its complete abandonment. Today, it preserves some 14th-century towers, including the keep. The castle grounds have been transformed into a garden and are a pleasant place for leisure.

Castle located on top of a hill, in an area surrounded by the village. The walls were raised by the Arabs and, later, D. Dinis expanded the fortification and D. Manuel ordered its reconstruction. This castle was part of the defensive system of Linhas Torres. Ruined by the 1755 earthquake, it still retains some sections of the wall and the large semi-circular turret that defended the entrance to the former Palace. Inside the wall, in an oval shape, there is a chapel, the citadel that includes the keep and three cisterns.

Originally called "Viana de a par de Alvito," the town was repopulated in the 13th century by King Gil Martins. In 1313, King Dinis granted it a charter and privileges and ordered the construction of the castle, which, rebuilt by King João II, still retains the characteristics of the original design. It is a pentagonal monument with cylindrical towers with cruciform arrow slits at its corners.