What is the sub-region of Bordeaux famous for its sweet wine production?

The sub-region of Bordeaux that is renowned for its sweet wine production is Sauternes AOC. This area is distinguished primarily for its production of sweet wines made predominantly from Sémillon, Sauvignon Blanc, and Muscadelle grapes, which are affected by a beneficial fungus called noble rot (Botrytis cinerea). This process concentrates the sugars and flavors in the grapes, leading to lusciously sweet wines with complex aromas and remarkable aging potential.

The unique climate and conditions of Sauternes, characterized by morning mists and warm afternoons, create an ideal environment for the development of noble rot, which is essential for crafting these high-quality sweet wines. As a result, Sauternes wines are often celebrated for their balance of sweetness, acidity, and rich flavors, making them some of the most prestigious dessert wines in the world.