Dear Oldkayaker,
There sure are a lot of interesting places for shipspotters in Grecce. I wont suggest anything different from the previous spotters. Since I live in Athens, I would too, reccomend the port of Piraeus and the surounding ports (Eleusis, Perama, Keratsini, Salamina) for great shipspotting. On the other hand, if you or your friends are interested in Cruise ships, the best time of the year to come to Piraeus would be between May and October, which is the cruising season for the region. Durind these months you can spot great and large cruise ships :-D, of Celebrity, Costa, MSC, NCL, RCI, Cunard, Aida and much more. Unfortunately,:cry: , during the rest of the year cruise ship visits are minimum with the exception of Louis Cruise Line ships.
Regards Nick K.