Mum doesnt know about argos, but Santorini is a beautiful island but very hilly, theres a temple at the top of the hills which is blue and blends into the sky above and is a must see on the island the island is littered with real greek villages,Mykonas is where they filmed shirley valentine,Naxos is a small island good for a nice rest but not very historical,Paros is a big island,Spetzi and Hydra have a beautiful harbour and again are nice but mum keeps coming back to Rhodes which is her favourite from there you can catch a catermaran and sail (for the day) to Turkey or Simi which are fabulous days out and as you come back into Rhodes harbour you see the famous Mandraks? ( the gazelles welcoming you back to port,she says you can sit on the harbour wall and people watch all day in the most beautiful surroundings.
At the airport or in Athens you can book all your island trips through Louis lines or at the Harbour of Peraus,they do island cruises taking you from Athens to Tinos,Rhodes,Crete,Egypt,Jerusalam and back to Athens this is a quite cheap cruise if you fancy, some of the islands have airports which if you fancy going to Sickalas group of islands Andreas,mykalos dija will cut you traveling time down,
Mum has a book on Greece which is 1000 pages and is very imformative i can borrow the book and try to answer certain places in more detail if you wish