The Nürburgring, simply known as "The Ring" by enthusiasts, is a motorsport race track in Nürburgring, Germany. It was built in the 1920s around the village and medieval castle of Nürburgring in the Eifel, which is about 70 kilometers (43 mi) south of Cologne, and 120 kilometers (75 mi) northwest of Frankfurt. Nicknamed The Green Hell by Jackie Stewart, it is widely considered the toughest, most dangerous and most demanding purpose-built race track in the world.