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The Douro Valley, between Boatmen and the border, is the result of the wonders of nature, but also effort and energy expended by humans in their transformation. The vineyard that produces the varieties of the famous Port wine is the cause and the main reason for all this hard work. Centuries of toil, fatigue, and human sweat, desventraram the land, removed the shale mass, shaped the heights of walls and terraces for the vines Arrimar, lifting this colossal work, which would reward the Marquis of Pombal in the eighteenth century, with the title of the first demarcated region of the world.
Note: this picture is not mine
Source link: http://www.douro-turismo.pt