Thank you very much. Croatian coast is the coast of my youth, I travelled a lot there. Now it is just too expensive for casual travel, but one day I will remind myself of those beautiful towns and beaches.
And about buried treasure in Greece... let me just notice that they sell replicas of Phaistos Disc all over Greece with amazing stories told (most of them claiming that this is a crypto map of ancient treasure... blah blah...) even though it is decrypted five years ago (it is an ancient prayer). So, having that in mind, I am sure that you can find map of hidden treasure there on the island and I am sure that it is authentic :)