Due to the sheer and strategic location of the coast, it became the position of a militar battery before the Civil War but was abandoned after the Second World War. This and some other batteries that erected in the Ártabro Gulf had the purpose of protecting the coastal zone. Going forward on the right hand side there is an observation bunker which, in the past, was covered with granite rocks. It is practically invisible from the sea.
The whole municipality of Oleiros has a history marked by the influence of the Castreña (Hill Fort) culture. The main representations are the castros (fortified villages). They correspond to the typical morphology of the Castreño civilization in Galicia. They are situated in high places where a settlement of round huts surrounded by a defensive wall with ramparts and terraces is located. The castro of Vixia de Subiña is the most representative. The enclosure measures about 150 m in diameter and is fortified by two concentric circular structures. There are two compartments defended by a wall up to three metres high and by an embankment, both having the access on the south side. At present the castros have not been excavated.