#4 - Adelaide
The Australian Grand Prix now takes place at Melbourne's Albert Park, but it was originally hosted by the South Australian city of Adelaide. Adelaide harboured eleven Grands Prix between 1985 and 1995, with some championship deciders and some other incredible moments taking place at the event. The stunning 1986 and 1994 conclusions to the championships were both at Adelaide and the characteristics of this circuit played a key role in the outcome of both races. The bumpy surface no doubt played a role in Nigel Mansell's puncture in '86 which cost him the world championship that year and eight years later, Damon Hill's view of Michael Schumacher's race-ending crash was blocked by the walls surrounding the track. Had Hill been racing at a regular race circuit, he would've likely seen Schumacher's incident and not lunged him so quickly.
On top of those moments, there was also the shortest F1 race ever in 1991, Ayrton Senna and Prost's last podium in 1993 and Hill winning by 2 laps in 1995, the joint-biggest margin in F1 history.
Melbourne's Albert Park (also a street circuit) has hosted the Australian GP since 1996, but most fans and experts agree that Adelaide just edges it in terms of the quality of the track.