Forget Napa Valley, Douro Valley was actually the world's first officially designated wine region and still holds on strong to its roots.

忘记帕纳谷吧！杜罗才是世界上首个官方指定的葡萄酒之乡，招牌稳稳的。

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To fully experience the Douro Valley, however, head upstream to the Alto Douro (Upper Douro) wine region.

BBC: The changing landscape of the Douro River Valley

Although all Port, produced in the Douro River Valley of Portugal, is made the same way (partially fermented wine is fortified with a neutral spirit, which stops fermentation and raises the alcohol level), there are two distinct types: ruby and tawny.

WSJ: Why You Should Make Time (and Place) for Port | On Wine by Lettie Teague