From culture to culinary delights, a Greek island cruise offers plenty to entertain and enrich passengers, says Marc Shoffman Get Travel Insider with Simon Calder. A newsletter packed with tips, deals, inspiration, and the latest travel news Get the Travel Insider newsletter with Simon Calder Get the Travel Insider newsletter with Simon Calder Email * SIGN UP I would like to be emailed about offers, events and updates from The Independent. Read our Privacy notice T he Greek islands serve up