Salamina is the largest of the Argo-Saronic islands. Most people know Salamina for the famous sea battle of Salamis in 480BC, where a small Greek fleet defeated a much larger Persian fleet. The island is also the birthplace of Euripedes. Salamina is very easy to reach from Athens as it is only 1km from Piraeus, but most visitors take the 15 minute ferry from Perama.
The island itself isn't very developed for tourism, the main town Salamis town doesn't even have a hotel, but it is worth a drive into the hills of the island as there are some amazing views on the island.
The beaches on Salamina are worth visiting, the best ones are on the west and south of the island.
Salamina is more famous the ancient battle fought off its coast than for tourism, but it does have some exellent beaches and is only a 15 minute ferry ride from Athens.
Location - Salamina is in the Saronic gulf just off the coast of Attica.