Temperature 
        Athens :June average high is 85 and the average low is 68 F ; July 90/72
        Mykonos June average high is 81 and the average low is 64 F ; July 86/70
 Currency:   Euro                                                 Universal Currency Converter
                     1 Euro = 1.20 US Dollar                 1 Dollar =  0.85 Euro (March 2021)

Time:       EEST (UTC/GMT+2)   +3  Eastern European Summer Time  adjusted for daylight savings- for reference London is UTC/Greenwich Mean Time  - 2 hrs ahead of UK, 1 hr ahead of Spain
Calling Code:
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Athens - below are the various neighborhood an their attractions
     Acropolis / Makrigianni
            Acropolis - UNESCO site
                      Full: €12; childen under 19 are free
            Parthenon
            Old Temple of Athena
            Theatre of Herodes Atticus
            Acropolis Museum - 300 meters from the Acropolis
                    - closed Mon, Hrs: 8a-8p
     Grand Promenade
              - pedestrian only boulevard, skirts the Acropolis, cuts through many neighborhoods
              - take from Thissio station/square to Hadrian's Arch
             - street name changes from Apostolou Pavlou to Dionysiou Areopagitou

     Monastiraki
                Agora Market

     Synatagma - Central square of Athens
               Hadrian's Arch        
   
              Temple of the Olympian Zeus

               Kallimarmaro Roman Satdium
   Thissio - close to the Acropolis
              Archaeological Museum
       
    Plaka 
               Benaki Museum

    Cape Sounion
                Temple of Poseidon

Additional info
www.tomsportguides.com/Athens-08-12-2011.pdf