The Oldest Line on a Map

The Douro was demarcated as a wine region in 1756, which makes it the oldest in the world with defined boundaries and a regulatory body — older than Chianti by more than a century and older than Bordeaux's classification by nearly one. The reason was fraud.

British merchants were buying port by the pipe and selling it in London as something better than it was. Portuguese growers were stretching it with wine from outside the valley. The Marquis of Pombal drew a line around the good terraces, put stone markers on it, and made everything outside illegal to call port. Some of those markers are still standing in the vineyards, and the line has barely moved.

The terraces

Nothing about this valley is natural. The schist was broken by hand and stacked into walls, terrace by terrace, over three centuries, on slopes too steep for any machine. The older ones — socalcos — are narrow, hold one or two rows of vines, and are held up by dry stone that has to be rebuilt when it fails. There is no economic case for maintaining them at modern labour costs, which is why the newer plantings run in wide bands cut by bulldozer instead.

You can read the whole argument about the region's future from a train window: the hand-built walls that make the landscape a World Heritage Site, and the machine-cut ramps that make the wine affordable to produce, on the same hillside.

The landscape is protected because it is beautiful. It is beautiful because of a way of working that almost nobody can afford to continue.

What port actually is

Fermentation is stopped early by adding grape spirit, which kills the yeast and leaves sugar behind. That is the whole trick, and it was invented to survive a sea voyage. Everything after it — ruby, tawny, colheita, vintage — is a decision about time and about wood.

The interesting bottles in the valley are not the ones sold in the Gaia lodges. Ask at a quinta for a ten-year-old tawny and a dry white port, both of which Portugal drinks and almost nobody exports as an idea. And notice that the region's serious ambition now is unfortified table wine, which is where the best fruit increasingly goes.

Getting there properly

The train from Porto to Pocinho costs less than a coffee in Zurich and runs at the water's edge for the last two hours. Sit on the right going up. Boats do the same stretch more slowly and more expensively; the road does it with worse views and a driver who cannot drink.

Book quinta visits a day ahead — most are working farms with two staff, not visitor centres. Several will collect you from Pinhão station, which is the single most useful thing to know about visiting this valley without a car.