The Calanques are a sort of French equivalent of fjords, with impressive white cliffs and neon aqua water. Boat tours run all day - you can choose whether you want to see three, eight or 10 calanques on your trip (the day we went the winds were too high to visit more than three) and we had a great time. On the way out you get to peek at some of the swanky houses perched on the edges of the smaller rocky cliffs, and as you travel into each inlet you'll be amazed at the colour of the water and the idyllic-looking beaches (the beach at Port au Pin is accessible by foot from the town centre, but you'll need to allow a good few hours for a round trip).
On the way back in you get a great view of the whole of Cassis harbour - don't forget your camera.
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