I'm planning an conference in Istanbul next May for about 50 people coming from 20 different countries. We've had the conference there previously near the city center. I thought it might be a nice to change to have it outside of town, perhaps in a relaxing resort type venue. Do you have an recommendations for something about an hour or so from town that would perhaps have vineyards, nice areas to walk and relax in at night? As people are flying from so many places, I would prefer not to arrange additional domestic flights, so am hoping there is somewhere not to far away.