Athens Taxi tour
Late model Mercedes Benz taxi €45 an hour, with English speaking driver.
Choose any duration for your tour of Athens, Cape Sounion or even Ancient Corinth.
Pre-booking a private tour in a taxi saved us time and the driver did know many interesting facts. He took us to some wonderful places that tourists don't usually visit.
I recommend you research according to your taste then you can contact Stephen at Piraeus Express to finalize the itinerary. The booking process is very easy and they reply promptly.