The small fortified islet of Sokastro is lying about a hundred metres north of Leukos bay. It preserves a great number of cisterns of different types, including three big communal cisterns, as well as houses and cellars; a small church and at least one pottery kiln and one iron furnace; a follis of c. 720 was also reported. The pottery scatter suggests that the fortified settlement had a major phase in the twelfth century, while the ceramic analysis indicates an eleventh-to thirteenth-century occupation period.