Fortress St. George
Argostoli Municipality, Greece
The Castle of Saint George, Castle of Cephalonia, or simply Kastro (lit. 'fortress') was a fortified settlement that was the main town of the island of Cephalonia, Greece, from the Middle Ages until the 18th century. The site is currently located near Peratata.
Fort data from Wikidata (CC0). Summary from Wikipedia (CC BY-SA).