Calanques National Park is a French national park located in Bouches-du-Rhône, in Southern France. It was established in 2012 and extends over 520 km2 (201 sq mi), of which 85 km2 (33 sq mi) is land, while the remaining is marine area. It includes parts of the Massif des Calanques stretching between Marseille, Cassis and La Ciotat. Several of the park’s best known features include the Calanque de Sormiou, Calanque de Morgiou, Calanque de Port-Miou, Calanque de Sugiton, as well as the Cosquer Cave.
If you’re going to hike it then you’ll need an intrepid spirit, as the GR 98 from Marseille to Cassis takes around 11 hours and leads you into some tough country. There are also mini-cruises departing from the Old Port, as well as guided kayaking adventures.