Ive been to Zakinthos too..and Zante which I think is near by. I went on a boat trip to this ship wreck which is on this Island surrounded by a rock in the shape of a Crocodile...beauuuutiful place. But some little Greek kid pushed me in the water with all my clothes on..I wasnt to impressed with that!
dont know if this will work but..
The pic on the right of the main pic is the croc rock and shipwreck!!
Soooo luverrly!!