I'm glad for you, that's great!
Be sure to take your fedora, it's never
too hot for that . (But you really might want to check the weather and decide if you want to take your leather jacket.
If you like ruins, (And I'm sure you do) you might try Elufsis, about 14 km N of Athens, and Cape Sounion. The temple of Poseidon at Sounion. It overlooks the sea, and is quite a photo oppertunity. Its situated at the extreme southern tip of Greece, a short coastline trip from Athena. By the way, do you know any Greek? It helps to at least be familliar with their alphabet.
And one place you don't want to miss if you can help it, is Delphi!
I was there when it was snowing. Don't think there'll be any chance of that with you, this time, but it is truly a spectacular place. All of Greece, but especially Delphi. Definately worth the drive!!!