The rock surrounding the old, weather beaten Touraine AOC door is all tuffeau, otherwise known as highly porous or soft limestone. Interesting thing about tuffeau, it feels almost chalky to the finger, soft and can be picked away quite easily, but its strength is legendary - just a few meters above this door is the vineyard, behind and below, the caves where the winemaking and cellaring takes places. Finally, the temperature is quite constant, to the point that you need a jacket, year round, if you're in there for more than 2 or 3 minutes. This picture is from the estate of one jolly, big-hearted winemaker, Patrick Corbineau, a traditionalist who listens very carefully to the land. The wines are very correct, wholly enjoyable.