Whether or not this is a 'fantasy' track or a 'real life' track, I could not find the answer to via a google search.
This is a very, very long track (25.9 km) and mostly very fast: The first part does have a somewhat classic Formula 1 feel -- fairly fast stretches followed by series of sharp turns and chicanes -- and then the second part is comprised of a very fast and somewhat scenic "autobahn-esque" stretch with no sharp turns...only gradual turns, during most of which stretch you can "floor" the accelerator.
The track and off track details are good, and the circuit is fun to race.