The azulejos at the train station are amazing !!! They describe the work in the Douro Valley with wine harvesting, shipping, filling barrels and loading ships ... Unfortunately a little …
DOC (Denominação de Origem Controlada): Wines that are born in the oldest demarked regions of wine and, therefore, controled by law (ground caracteristics, castes, winemaking, bootleling).
Take the morning train from Porto to Pinhao and then hike into the mountains. If you're quick, you can still make the whole journey on the afternoon train.