Κουφονήσι, Italy
Daskalio or Dhaskalio (Greek: Δασκαλιό) is a tiny, uninhabited Greek islet in the Cyclades just off the west coast of the larger island Keros, approximately 150 metres in diameter. Formerly, it was a promontory of Keros, but is now a tiny islet because of sea level rise.
Listen to the audio guide for Daskalio Free on WIP — starts by itself when you arrive, even with the screen off