Kalymnos is not the typical Greek destination with yelling British tourists, as in Zakynthos and Rhodes, or the great beaches. It is a quiet island that gets most of its beauty from the scenery. The mountainous landscape is great for those who love walking in the nature. The small villages also attract the visitor. There isn't much to do as for sighseeing, except for the castle and some churches, but you can certainly relax having a coffee in Emporio or swimming in Massouri. The best tavern to eat is "To limani tou Michali" in Pothia, just next to the gift shop of Mrs Froso (I don't remember the exact address). Also see the lovely statue of Poseidon in Pothia.