When driving east from Cassis, many small dirt roads lead off to the cliffs which present amazing views of the small bays, the islands and the blue Mediteranean.
Great places to stop for a barbecue while enjoying the view of the Antibes.
Between Cassis and La Ciotat is the road Route du Cretes. It runs on top of the mountains with excellent views of the Mediteranian Sea. There's also a walking trail. Looked to be very popular!