Cassis is a very touristic town, 20km away from the East of Marseille. With less than 8000 inhabitants, it is mostly known for two listed sites: the massif des calanques, ant the Cap Canaille. There are also many vineyards, producing the famous Cassis white vine, one of the first AOC label in 1936.
The last sunday of october, every year, thousands of runners invade the town, for the Marseille-Cassis half marathon. The finish line is on the port. The bravest often end up diving in the sea at the Grande Mer beach.
From the peninsula you will easily get to the calanque de Port-miou, then Port-pin. And En-vau by a small path a little bit more difficult. Some boats can take you for excursions in the calanques all the way to Sormiou.