The Corniche de l'Esterel is the coast road that runs from Cannes to St Raphael. If you get a chance to go insist on being a passenger: the views across the sea and the red rocks of the Esterel are magnificent. And try to do the trip in Winter on a bright, sunny day after a Mistral so the air is free from pollution and the colours are even more intense..
(You need to go in Winter because the rest of the year the road's one long traffic jam...I took this in Summer on a fairly windy day in a queue of traffic)
There are lots more Sky Watch photos to be enjoyed here