There have been some great fictional race tracks in video games over the years from the realistic tracks of Forza Motorsport and Gran Turismo to the completely unreal ones seen in Mario Kart.
My favorite is probably Rio de Janeiro from Forza Motorsport 1. I don't know why. Maybe because of that long straight with a chicane between turns 2 and 5 or maybe it's because of combination of gently sloping turn 9 and sharp 10. All I know for sure is that this was my favorite track in the game.
So, what's your favorite fictional video game race track?