I'll be in Greece for 4 days (not including a travel day to Athens and a travel day out of Athens) at the end of June/beginning of July. Originally, when I thought the trip would be longer, I was planning on seeing Athens for a day, then Santorini, Mykonos, and maybe Delphi or Meteora. Clearly there's not enough time for that now.
What do people recommend for such limited time? Is it worth it to do a day in Athens and say, 3 days in Santorini (we'd splurge and fly over to save time)? Is it better to stay closer to Athens? I've heard good things about Hydra or know people with a home in Diakofto...? I'd love some suggestions!