Classified as a National Monument in 1910, the castle that stands before our eyes today occupies an area of 3.2 hectares and has an approximate perimeter of 670 meters. Its walled section, with an irregular oval layout, is punctuated by pyramidal battlements and highlighted by 23 towers, of which 10 are turrets, 2 have a hexagonal plan, and 11 are quadrangular.
Currently, access to the Keep is via the north-facing side, through an external staircase made of schist masonry, attached to the tower's outer structure.
This is flanked by seven magnificent vaulted brick turrets (three to the east, three to the west, and one to the south), which join the wall section on the northern slope of the fortification.
Inside, the Military Museum, officially founded in 1983, occupies the four floors, sixteen rooms, terrace, and crypt of the Keep, as well as the entire exterior space bordered by the turrets, including the Princess Tower. This museum possesses a collection of great historical value, allowing visitors to follow the evolution of light weaponry from the 16th century to the mid-20th century. It seeks to promote the appreciation, enrichment, and exhibition of the historical-military heritage attributed to it and to disseminate the cultural values linked to military history. Visitors can also climb to the crenellated terrace to contemplate the marvelous landscapes, overlooking the Nogueira, Montesinho, and Coroa mountain ranges, the peaks of Sanábria, and the Leonese lands.