Last race at old 14.1 km long Spa-Francorchamps 1970. So dangerous that the drivers refuse to race there in 1969. Came back in 1970 with new barriers (almost non existing before that in many racetracks). 244 km/h pole lap average was very high. New barriers didn't save it as an f1 venue in the future. Next race was in 1983 on a shortened to 7 km circuit, but despite that it is the best f1 circuit used today.
