The definitive project of Mera lighthouses was carried out by Rafael de la Cerda. The result was two independent towers of octagonal plant that entered service in 1917 and still continue at present without major changes.
Both towers in the estuary of A Coruña are separated by 300 m reaching a height of 11m the front and 14m the rear, to raise its light bulbs 56 and 81 m, respectively, above sea level.
The electrification of these lights goes back to 1932 and with this reform also modifies the range of lights extending to 10 miles.
In 1977 a last modification takes place and since then it has remained in service with a range of 8 miles.
Curiosities, myths and legends
The lighthouse of Mera is a privileged balcony to observe the Ria of A Coruña, the one of Betanzos and the one of Ares. First we have the tip of "O Seixo Branco" and face the island of A Marola.
The popular saying: "Who passed to Marola, went to love everything" which means that if you have crossed the Marola you are prepared to sail in any sea, referring to the numerous accidents that can cause the winds and currents of the area .
Some people believe they see the form of a giant tortoise on the island.
