Protecting the bay of San Gemiliano is the tower of the same name, then called Torre de Saccurru.
It constituted an intermediate tower (between the tower of Barì and that of Bellavista) to control the coast, and in particular the inlets of Porto Frailis and the bay of San Gemiliano.
The ruggedness of the sites dictated a bold construction straddling the rocks and overhanging the sea, making it inaccessible from the sea itself and almost isolated even from land.
Erected in the first half of the seventeenth century (1639), it was also equipped with a cannon, adding defensive purposes to that of mere sighting.