For a graduation present I'm going to be spending some time split between Istanbul and Athens. I'll be arriving in Istanbul the afternoon of May 6th and flying out the morning of the 17th. I'm set on the touristy things to do in each city, but I'm looking for help with a day trip outside of the city for each location. One suggestion I've had, not for a just one day, was to go from Istanbul to Izmir and visit Ephesus then ferry/fly to Athens. The Princes' Islands were also suggested. One for Athens was to visit Corinth. I'd like to hear how others would break down the time to be spent between the two cities. Right now I'm leaning toward spending the 6th-11th in Istanbul and 12th-16th in Athens. If I go to Izmir I'd most likely take one day from each city.