Forte di San Giorgio, Seaside fortress in Capraia Isola, Italy.

Forte di San Giorgio is a fortified structure built on volcanic rock on the island of Capraia, positioned approximately 100 meters above sea level. The fortress commands views across the water toward nearby islands and the open Mediterranean.

The Genoese began building the fortress in 1540, after the corsair Dragut destroyed the earlier settlement on the site, which was based on a Pisan fort of the 12th century. The fort could shelter the whole population in an emergency, so the settlement in the island's centre, on the plain by the church of Santo Stefano, was abandoned and the harbour grew. In the 19th century a large landslide, still visible from the sea, carried away the east side and the "Quartiere delle donne", which included a convent.

Locals call the castle Forte di San Ghjorgiu in Corsican, a name still used on the island. Built from 1540, it was designed to shelter the whole population in an emergency, which drew settlement away from the plain by the church of Santo Stefano and toward the port. The east side, destroyed by a 19th-century landslide, held the Quartiere delle donne, a quarter with a nuns' monastery.

Access to the site involves walking along a path that descends toward the shoreline. Visitors should prepare for uneven surfaces and exposed areas that require careful footing.

The 19th-century landslide that carried away the eastern side is still visible from the sea, and it destroyed the "Quartiere delle donne", a quarter that contained a convent of nuns, killing many of the fort's inhabitants.