The 2004 German Grand Prix was held at the circuit in what valley?
2004 German Grand Prix: The 2004 German Grand Prix was a Formula One motor race held on 25 July 2004 at the Hockenheimring. Hockenheimring: The    is a motor racing circuit situated in the Rhine valley near the town of Hockenheim in Baden-Württemberg, Germany, located on Bertha Benz Memorial Route.
Rhine valley