I still think a mountainside desert track would be a pretty awesome track to have, like, it roughly circles around a mountain, it would be about the size of Aston.
It would look kinda like the mountain pass from
this episode of Top Gear, it would be good also to have the railings on the side of the road unfixed so crashing into them would result in the car falling off the mountain, forcing the players to keep the car in control.