In earlier years I've cycled over practically the whole of mainland Greece and have also toured in Crete and a few of the smaller islands. I'm not cycling actively now for health reasons and some of what I write here will be out of date, but I hope it may still be useful. Greece is unfortunately a troubled country these days but I think it should still be a rewarding place to cycle.
Roads and other local conditions for cyclists.
Don't frighten the horses
A mishap on the road.
Diary of a Greek tour - 1985