I remember driving under those on the way to the hotel the last time we went through Frankfurt. Nice to see them in FlightGear... and awesome frame rates!
The cars was available for download in a latin american fg forum some years ago. Was from PRESTES HANGAR -- http://presteshangar.blogspot.com. Search for "Fusca".
Taupo Motor Park in New Zealand, but I was testing it in Australia haha.
Even though it is real, I made it less realistic by making the track really long and wide (as you can see from my second screenshot in the post above).