Atokos

Atokos is a small, uninhabited Greek island in the Ionian Sea off the coast of Acarnania and is one of the most westerly and perhaps remotest of the Echinades Islands. As of 2011, it had no resident population. It lies 9 kilometres northeast of Ithaca and 8 kilometres southwest of Kastos, just northeast of the main shipping and ferry channel between Brindisi in Italy and Patras on the Peloponnese. From such large vessels you can get a reasonable view of the southwestern end of the island and its steep cliffs.
To approach it and land requires a private boat, and safe anchorage is advisable only in calm weather at one of its two key anchorages: One House Bay on the east coast and Cliff Bay on the south coast. The former is the preferred option as it shelters boats from the prevailing northwest winds and has better access to the island via a pebbled beach and small flat hinterland.

Wikipedia