It comes from the Douro Valley in the northern provinces of Portugal.

The Douro valley where Port wine is produced was defined and established as a protected region, or appellation in 1756.

The location in the Douro Valley, where grapes for port are grown, offers visitors a chance to investigate the region's wine production.

Vintage port from small producers situated in the Douro valley are almost always single quinta wines and labelled as such.

The south has developed an extensive monoculture of cereals and olive trees and the Douro Valley in vineyards.

The grape is also grown in the Douro valley, where it is sometimes confused with the Gouveio grape.

The Douro snakes past the terraced vineyards of the Douro Valley.

Crafts are much in evidence, there are wineries to visit, and, in the Douro Valley, the terraced vineyards on the mountain slopes.

The following year as $3.20 favourite won a second Classic in defeating Douro Valley and Red Ruler, by 0.2 lengths.

The Corgo line was a metre gauge railway that connected the city to Regua, 25 km south, in the Douro valley.