It is a phenomenon that the noblest white wine variety, Riesling, flourishes exactly along the geographical line which marks the most northerly point where viticulture is possible. The special climate, described as a continental cool climate in viticulture, occurs only at the 50° latitude and provides ideal conditions for the Riesling grape, a late-ripening grape variety. Since the Rhine River makes a slight detour for approximately 30 km, the Rheingau region enjoys an ideal microclimate. The river, which warms up during the day, and the shallow layer of Taunus quartzite emit heat and cause optimal air circulation: the best conditions for Riesling to thrive and prosper.