The Circuit de Spa-Francorchamps is the venue of the Formula One Belgian Grand Prix and the Spa 24 Hours and 1000 km Spa endurance races. It is also home to the all Volkswagen club event, 25 Hours of Spa, run by the Uniroyal Fun Cup. It is one of the most challenging race tracks in the world. This is mainly because of its fast, hilly and twisty nature. Spa is a favourite circuit of many racing drivers and fans.