Halki, a tiny Greek island in the Aegean Sea, is the type of place you go to when you need a getaway from your getaway. Off the beaten path, Halki is quiet and sleepy when other Greek islands are flush with visitors. The only way to arrive is by ferry. Halki, with a total area of just 11 sun-kissed square miles, is the smallest inhabited island in the Dodecanese island group.