Click here for the 1936 map.
Some of the bumps were smoothed when the roads were resurfaced for 1973. Barriers that had been welcomed in 1969, when Hill and Rindt crashed, in 1975 were deemed deficient by drivers who refused practise. Team mechanics joined local workers to renovate them while officials prevaricated, and eventually one practice session was held. The race started with a chaotic accident, then on lap 26, the rear aerofoil of the leading car, Stommelen's Hill, failed and one of the humps bounced the car onto and partly over the guard rails. Five people were killed. Three laps later the race was stopped, and that was the end of GP racing.