We will be at the port of Marseille on a cruise for one day and I'm trying to find something fun or interesting to do. Marseille isn't one of my favorite places so I've never explored it. I've been to Arles and Avignon many times and stayed in both places for extended periods. If I visit either I won't want to go back to the ship. I've also visited Cassis and swam there as well as swimming under the Pont du Gard. We've also toured Provence extensively and visited Aix. I'm running out of ideas.
We won't have a car so must depend upon trains, boats and buses.
I read that it's possible to take a ferry to Chateau D'If which sounds like fun and also a tourist train that goes around Marseille and up to the cathedral but I don't know if the sites are worth looking at in the city or not.
We would really just spend the day relaxing in a beautiful village eating seafood and drinking wine. Somewhere not Marseille. Any ideas?