Greece Syros is a Greek island in the Cyclades and in the Aegean Sea. The largest towns are ErmoupoliAno Syros, and Vari. Ermoupoli is the capital of the island and of the Cyclades. It has always been a significant port town, and during the 19th century it was even more significant than Piraeus. Other villages are Galissas, Foinikas, Pagos, Manna, Kini and Poseidonia. Galissas, is built on the namesake, the beautiful sandy bay in Galisou and is 8Km from Ermoupoli. Galissas is the major resort of Syros.