My 2 for The Downs are:-
Southdowns Way north of Whiteways Arundel, looking down on Houghton and Amberly.
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I do that both ways to/from work regularly, still in Sussex, I went to Newhaven via Lewes, as you come over the hill the view is stunning.
A favourite drive of mine is going to Spa Francorchamps, aside the scenery getting better by the miles once past Brussels, the excitement build, as we near the circuit.
Only done it a few times but southern France through the alps to Italy is wonderful, Grenoble to Turin.
The views through the blue mountains to Bathurst from Sydney is a good one too.
Sadly regular reality is Lancing and worthing in a traffic jam.