The protagonism of the lighthouses of the islands of the province of Pontevedra lies in the extensive and trimmed of its coastline so its function is to signal the entry and navigation of the corresponding estuaries.
Its light would warn of the presence of the islet and signalize the center of the channel of the estuary of Arousa. Likewise, the commercial boom of Carril and Vilagarcía made it necessary to improve the lights that aided the navigation through its interior.
In 1860 he wrote the project for this fifth-order lighthouse engineer Elduayen, but it will be Ángel García del Hoyo, Elduayen's successor, who will carry it out, going into operation in 1869.
With the passage of the years it becomes evident its inferiority and it is added to the general beaconing of the estuary of Arousa, with a range of 13 miles. In 1993 the last reform was carried out consisting of its electrification.
Curiosities, myths and legends
The island of Rúa is entirely rocky, formed by granite bowls, difficult to access and uninhabited today.
It rises from a background of 20 m. The seabed is full of caves, crater passages and rocky figures giving shelter to a great diversity of fauna and flora.
Between the different forms stands out a huge slab supported on three rocks that remembers the dolmens.
We can observe among the fauna the "Star of Honduras", a starfish that has 7 arms and can reach 60 cm in diameter.
