I am planning to visit Greece, mainly staying off the beaten path (avoiding Santorini, Mykonos, etc). I have to fly into Athens and then want to eventually end up in Corfu (and then carry on to Sarande, Albania after). What would you recommend along the way, either via ferry or flights that may be worthwhile for a day or two to stop by to see? Originally I planned on Athens, Crete, and Corfu, but may skip Crete due to it being out of the way.