Vouvray (wine) towards drier styles of wine including sparkling Vouvray. More warmer climate years promote the production of sweeter, dessert style wines. The northern location and relatively cooler climate combines to make harvest in Vouvray one of the last to completed in France, often lasting into November. Vineyards are usually planted on the plateau above the river bank in soils composed of gravel and clay on top of tuffeau. Chenin blanc is the dominant and nearly exclusive grape of Vouvray. While the obscure minor grape Arbois is permitted in the Vouvray AOC, it is rarely seen. With more than 5,000 acres (2,000
Loire of the estuary), and the beaches of Le Croisic and La Baule along the coastline. Its main tributaries include the rivers Maine, Nièvre and the Erdre on its right bank, and the rivers Allier, Cher, Indre, Vienne, and the Sèvre Nantaise on the left bank. The largest tributary of the river is the Allier, in length, which joins the Loire near the town of Nevers at . Downstream of Nevers lies the Loire Valley, a UNESCO World Heritage Site due to its fine assortment of castles. The second longest tributary is the Vienne which joins the Loire at Candes-Saint-Martin at