Hike the "Calanques de Marseille"

You can go there either by car, boat, or bus and then start hiking.I personnally did it using the bus service. It is quite simple, but since we were not in the high season, there was not a lot of bus going there. 

From Marseille, you need to go to the metro station Castellane and take the bus 19 that will bring you to Madrague de Montredon (we start hiking at this point because the other bus was in a long time, but you can also take the bus 20 for Callelongue). If you manage to reach Callelongue in bus, you may have time to do a longer hike and see more callanques than we did ! The walk between Madrague de Montredon and Callelongue is quite long, but you have some nice view all the way and there's plenty of old bunker everywhere that you can go in. 

Once you arrived at Callelongue, you can start your hike thru the Callanques.As for us, we stopped at Calanque de la Marseilleveyre, but there are a lot more to see if you continue. I'll suggest bringing a lot of water and some food since there is not a lot of places up there. There is a small restaurant at Calanque de la Marseilleveyre, but there is no toilet.