My favourite was @Prisoner-monkeys entry. It would require a fair amount of deforestation to make some of the roads wide enough, but those wooded sections are still quite a nice setting. The flow of the entire circuit is quite nice, and looks very American somehow (I think something about the shape reminds me of Road America). Runner-up was Kingshark.
Fun fact- Nick’s entry was around the place I first drove a car. And, rather more interestingly, it was a filming location for the F1 film Rush, which is coming out this year. A lot of scenes on pit straights will have been filmed on a large set they built there.