Rheinhessen sits in a valley, bordered on the west by the Nahe River and on the north and east by the Rhine. The area between the communities of Worms, Alzey and Mainz is the largest viticulture region in Germany, with vineyards extending across more than 26000 hectares of land. The Rheinhessen winegrowing region is divided into three districts - Bingen, Nierstein and Wonnegau with 24 regional sites and around 450 single vineyard sites. Due to the varying soil types and microclimates, many grape varieties are grown here, including the three traditional white varieties, Müller-Thurgau, Silvaner and Riesling. The Portugieser grape is the most important red variety, and the area around Ingelheim is known for its full-bodied Spätburgunder (Pinot Noir) wine.