I'm considering signing up for the 13 days in Turkey tour and then going on to Greece afterward, though the most time we can likely be away is 3 weeks. In the Back Door to Europe Rick poses the question of To Greece or Not to Greece and states "I question the sanity of investing a lot of effort, money and stress just to spend a couple of days in huge, polluted Athens and take a quick trip to an island - especially given that 500 years before Christ, southern Italy was called "Magna Graecia" (Greater Greece)." I have traveled to southern Italy before.
How about 1 week in Greece? I'm not really all that interested in going to some touristy, "party" island but am very much interested in historic sites. I would consider going to a more off the path island if one merits a visit. Besides Athens, where else should I consider putting on the itinerary?