I was fascinated at how they make wine with grapes grown on the side of a volcano and almost no rainfall on the island of Lanzarote. They dig a pit in the volcanic ash to get down to more acceptable soil, plant the grape vines, then carefully cover the soil with the volcanic ash. The ash holds the heat of the day through the night and the extremely high humidity in the morning collects as dew just below the ash layer and waters the vine. Because there is a strong continuous North-East trade wind, they have to build semicircular walls out of volcanic rock to protect the plants from the wind.
La Geria, a protected area, is the most prestigious wine growing area on the island and produces between 5 and 6 million kilos of grapes per year.
I think I got this on pretty close to right so anything you feel needs improvement would be welcomed!