Argyronisos (Greek: Αργυρόνησος - "silver island") is a privately owned island in the Aegean Sea. The island lies between Kanatadika on Euboea and the mainland near Achilleio, Magnesia. Administratively, it is part of the municipality Almyros. It is 240,000 metres large. The most prominent landmark on the island is the lighthouse built in 1899. Notes Uninhabited islands of Greece Landforms of Magnesia (regional unit) Islands of Thessaly Islands of Greece Private islands of Greece