There are over 80 grape varieties grown in the Douro valley. Most are old vines jumbled together within the same vineyards and are indistinguishable from one another. There are however, five varieties acknowledged as having best adapted to the region and which make the finest Port. Listed in order, from the most popular to the least, they are: - Touriga Franca, Tinta Roriz (Tempranillo), Tinta Barroca, Touriga Nacional (considered the finest), and Tinto Cão.