One of the main reasons James and I made the side trip to Cassis was to visit the famous Calanques. Since we didn't have enough time to explore the area on our own, we decided to take one of the highly recommended boat excursions.
There are three options for boat tours; you can visit the first three, five or all nine Calanques. The first three will take you approximately 45 minutes, the first five will take you 65 minutes and all nine will take you 90 minutes round trip.