Five Reasons to Visit Cassis

 1) Cassis is an easy drive if you're staying in any of the Provence towns or Marseille

 2) The clean beaches, rugged cliffs, and smaller crowds than the rest of the Cote D'Azur

 3) Picturesque views from every corner

 4) Enjoy a seafood lunch at the beautiful port (every restaurant has a variation of moules)

 5) The calanques.  Take a guided-boat tour after lunch in the port or take a hike on the trails from above (Note: they may be closed during the summer months due to the risk of forest fires)