Nürburgring

The 150,000 capacity Nürburgring is a motorsports complex around the village of Nürburg, Rhineland-Palatinate, Germany. It is located about 70 km (43 mi) south of Cologne, and 120 km (75 mi) northwest of Frankfurt. It features a Grand Prix race track built in 1984, and a much longer old "North loop" track which was built in the 1920s around the village and medieval castle of Nürburg in the Eifel mountains. The north loop is 20.8 km (12.9 mi) long and has more than 300 metres (1,000 feet) of elevation change from its lowest to highest points. Jackie Stewart nicknamed the old track "The Green Hell," and it is widely considered to be the most demanding and difficult purpose-built racing circuit in the world.

• http://en.wikipedia.org/wiki/Nürburgring