A mandatory stop on our European road trip was the Nürburgring. So after our castle-hopping excursion to Wurzburg, we headed north to the “Green Hell”. What is the Nürburgring? The Nürburgring is one of the most famous racetracks in the world. With 12.9 miles of track and 73 total turns, the Nordschleife course at the Nürburgring is one…