[Guest]

The old "original"part of Athens for sure, "Plaka". Both the pre 20th century town and the ancient artefacts in/near (ncluding the Acropolis[/size]

) it are perfect for your shoot.

 
plaka athens

 

Lykavittos Hill gives a great 360 degree view of Athens, which may give nice backdrops both day and night.

 
https://b.geolocation.ws/img/030/032/103-F.jpg 

Acropolis, with the Parthenon, in front, with Lykavittos Hill in the background.

 

Can't recommend on islands, as I have no idea about the time you have available and ferry schedules and durations.

 

Ah, yes, Plaka is the name of the old town.

As to the second picture, <a class="bbc_url" href="http://www.google.com/url?q=https://en.wikipedia.org/wiki/Mount_Lycabettus&sa=U&ved=0CB4QFjABahUKEwjtu7nbsr_HAhXEchQKHVvBAOo&usg=AFQjCNE1Z3iYfUTSCA-KBHfZ9FxXQFhy8g" title="External link">Lycabettus</a> hill is the one on the right in the background, the image was taken from <b>Philopappos</b>