An important place during the development of our cars was the 7.8 mile track known as Nardo, has been bought by Porsche.
http://www.autoblog.com/2012/04/11/porsche-acquires-nardo-high-speed-test-track/
http://www.autoblog.com/2012/04/11/porsche-acquires-nardo-high-speed-test-track/