The Moon

[jigman5]

Put a track on the moon.

 

[PsuPepperoni]

Straight to the point. I like it.

 

[jubeiiiii246]

Are you serious? Imagine driving a FGT on the moon hit a bump and you fly off xD nice idea but am laughing hard here

 

[epic_apri_39]

Are you serious? Imagine driving a FGT on the moon hit a bump and you fly off xD nice idea but am laughing hard here

I'm sure this is just a stab on the appearance of the moon challenges on GT6

 

[Inferno251]

Crazy idea, but very unlikely to happen.
The closest thing to that currently is a version of the Nurburgring with the Moon gravity/physics enabled, available on the GT6 SpecII Mod (which is currently in beta),