And what about Isle of Man? Those are normal roads, but also used for one of most dangerous race events, always someone is going to die. Anyway it is also circuit in some way, I think, but so is monaco GP too, all street/road based tracks are really
But Isle of Man, Green Hell, mountain track, all such share something very common, long, very lot of different corners, kills n00bs like we have never seen before, our current tracks are not even near match of challenge and enjoyment that awaits with some of these examples.
It is perfect combination of different corners and elevation changes, there have to be some kind of nice flow also not those artificial straight and tight corner at end type, rather boring, more fluent or something, wish I could explain better what that magic is in some tracks that some do miss.