gulf of the Aegean Sea between Ákra (cape) Soúnion of the Attica peninsula and Ákra Skíllaion of the Argolis peninsula of the Greek Peloponnese. A maximum of 50 mi (80 km) long northwest–southeast and about 30 mi wide, it is linked on the west to the Gulf of Corinth by the Corinth Canal. At its widest point the gulf is divided by three of the Saronic islands: Salamís, Aíyina (Aegina), and Póros. Piraeus, the port of Athens and largest port of Greece, is situated due east of Salamís; the ports of Elevsís and Mégara lie north and northwest, respectively, of Salamís. Off the much indented coast of Salamís, Athenian naval and land forces achieved a crushing victory over a massive Persian naval force in 480 BC.