Five communes on the left bank of the Garonne — Sauternes, Barsac, Bommes, Fargues, Preignac — organised around a hydrographic accident: the Ciron, a small river kept cold by the Landes forest, meets the warmer Garonne and breeds the autumn mists that carry noble rot. Nowhere else on earth does botrytis strike so reliably.
The Dutch built the sweet-wine trade here in the seventeenth century; 1855 classified the wines alongside the Médoc's, with Yquem alone above all. The vineyard is nearly pure Sémillon with Sauvignon's lift, farmed at heroic cost for a wine the age drinks too little of — the region's glory and its predicament in one.