The Circuit de Spa-Francorchamps is one of the world's most famous but deadliest race tracks. Since 1922, the legendary Belgian road course has been the ultimate test for racers, having claimed the lives of almost 50 competitors. Its notorious high-speed Eau Rouge corner remains one of the most dangerous challenges in motorsports. Sébastien Buemi, four-time winner of the 6 Hours of Spa, takes us turn by turn through the track to show us just what makes Spa so dangerous.