Mt Panorama at Bathurst. I used to think Adelaide was the best until I drove around the mountain for the first time. I have nothing but respect for anyone giving it 100% effort through those turns.
I make sure I go there for a drive a couple of times a year. I know it seems a little childish but I've been keeping count of how many laps I've done. 155 down and 6 to go before I've completed my own 1000km of the track.
I never get tired of watching videos of The Mountain. I'm also going to be biased and say Road Atlanta though.My favorite circuit in the UK is Cadwell Park because of the mountain
While I have whole US to pick from, I'll stick to more local tracks. Grew up less than a mile from Waterford hill, so it'll always have a place in my heart for it. But, now that Belle Isle is open again, that is my track!