They may sell 'Greek yogurt' (which unlike other yogurts, is strained, so thicker and richer than regular yogurts) everywhere, but Greek yogurt in Greece is twice as thick and rich, especially if you find a specialist dairy shop to dish it out. The marriage of Greek yogurt and Greek honey, with a few walnuts on top is a marriage made in heaven.
γιαούρτι αγελαδινό (yiaourti ageladino) cow yogurt
γιαούρτι κατσικίσιο (yiaourti katsikisio) goat yogurt
γιαούρτι πρόβειο (yiaourti proveio) sheep yogurt
σάλτσα γιαουρτιού or σως γιαουρτιού (saltsa or sos yiourtiou) yogurt sauce.
Image by cyclonebill