Plump, luscious, exotic and trailing a chequered reputation, the Grenache grape is the Lola Montez of vine fruits.

FORBES: International Wine of Mystery

All 24 sites could be accounted for if the first Cabernet Sauvignon vine was a hybrid between Cabernet Franc (another red variety from Bordeaux) and Sauvignon Blanc (a white grape grown widely in western France).

ECONOMIST: Secrets of the Cabernet