Medieval fortress rebuilt in the 19th century, during the French invasions. It was part of the Linhas Torres, being one of its most important fortifications. It is made up of three asymmetrical bulwarks, whose walls are open to cannons, divided by deep moats, which are distributed in a Y shape. At the highest point of the fortress are the ruins of a primitive chapel.

A fortress of the period of the Philips (kings of Spain and Portugal), its construction started in the 16th century. This unique circular fortress is na example of the Renaissance fortresses.

Also named Fortress of Saint Teodósio, as a tribute to a prince, it has an irregular poligonal plan. The precinct is separated from the road by a high, irregular wall. One can still see, on one side, a part of the primimitive wall with a portal.Inside, it has a cylinder shaped tower with a balcony.

Also known as Cerro do Castelo, is a fortified village where many oculadas plates were found in gold and silver. This points to worship of a deity with prophylactic powers in diseases of the eye.

Fortress located at the mouth of the Gilão River, built in the XVI century, with bulwarks. It was rebuilt during the Restauração wars. Nowadays, it is in an advanced process of degradation.

Similar to the Bateria das Fontainhas but more recently build, this fortress was projected at the beginning of the 20th century by the engineering major António Augusto Nogueira de Campos.