I need some suggestions and advice. I am flying with one of my friends into Athens from Istanbul on Friday, March 14, for about six or so days (still deciding). We are flying out of Istanbul for the US on Sunday, March 23. We would like to arrive back into Istanbul on Thursday/Friday.
I would like a couple ideas of places to go in such a short stay. We are two guys, in our mid-20s, experienced world travelers. We are looking for some cool sights to visit, interesting culture, and it would be a plus if destinations youthful and has a good nightlife. Probably only have time for two destinations.