Salamis Island, the Argosaronic.
Salamis has only three, strictly utilitarian hotels.
The nicest is the Hotel Votsalakia (T. 210 467 1344, fax 210 4671432) on the waterfront at Selínia: it is welcoming and has its own good, restaurant/ taverna.
Of the other two, both in Aiántion—the Hotel Gavrïel (T. 210 466 5748) and the Melina Resort Hotel (T. 210 464.0562)—neither is recommendable except in an emergency.