What’s the Draw: The Aegean island of Skiathos was a well-kept secret until the movie Mamma Mia filmed here.
Why It’s Worth the Airfare: Anyone who has seen Mamma Mia understands the attraction of Skiathos. Narrow cobblestone streets wind past whitewashed houses, quaint taverns, and markets. And despite its minute size, Skiathos has 60 beaches, more than any other island in Greece.