Originally built in 1969 to replace the bland and bumpy Zeltweg Airfield circuit located just across the street, the Österreichring track was situated in the Styrian mountains and it was a visually spectacular and scenic circuit. Although narrow at 10 meters (33 feet) in all places, the track was very fast, every corner was a fast sweeper and was taken in no lower than third gear in a five-speed gearbox and fourth in a six-speed gearbox. It had noticeable changes in elevation during the course of a lap, 65 metres from lowest to highest point. Like most fast circuits it was a hard circuit on engines but more difficult on tires, because of the speeds being so consistently high. Many considered the Österreichring to be dangerous, especially the Bosch Kurve, a 180-degree banked downhill right-hand corner with almost no run-off area which, by 1986 when turbos pushed Formula One engine power to upwards of in qualifying, saw Derek Warwick speed trapped at in his BMW powered Brabham BT55 on the run to the Bosch Kurve. There were other testing corners such as Voest-Hugel, which was a flat-out 180 mph right-hander that eventually led to the 150 mph Sebring-Auspuff Kurve (this corner had many names over the years, Dr. Tiroch and Glatz Kurve were others) which was an essential corner to get right because of the long straight afterwards that led to the Bosch Kurve.