Home Wine Grape Varieties Tinto Cao (red) Decanter Staff August 13, 2010 One of the rarest, high quality port grapes grown in the Douro Valley, highly prized for its spicy character. Written by Latest Wine News Decanter magazine December 2025: See what’s inside Photo highlights from Decanter Fine Wine Encounter Singapore 2025 Peter Fraser, Yangarra Estate winemaker, dies at 51 The ethical drinker: Climate ‘trailblazers’ championed in new book Wine prices: Which is Europe’s most expensive country?