The huge surface of Lake Neusiedl has a crucial influence on the climate and viticulture in Rust. As the grapes reach ripeness in autumn, fog cloaks the region’s vineyards. Humidity promotes the noble rot Botrytis cinerea, which perforates grape skins. The warm, late autumn sun raisins the grapes and bestows noble sweet wines their legendary concentration of sugar, acidity, and aroma.