Our Marseille shore excursion was canceled due to bad weather. Instead, the ship stopped in another port called Toulon. It's a beautiful port!
Valencia hop-on hop-off line is very long. Make sure what you want to see before you go. I suggest Viator providing hop-on hop-off maps BEFORE each excursion so we know what to expect. Also Hop-on hop-off should set up a desk right at the ship exit to answer the questions and give directions. The morning driver was really nice and helpful while the afternoon driver is rude and arrogant. He could understand English pretty well but refused to answer question if we couldn't speak Spanish or Italian to him. He put his one foot up next to the ticket box and checked his smart phone whenever he stopped while everyone on the bus had to wait. Albufera Natural Park Tour took a big chunk of the day and all we really saw was the rice field and sit on a 1/2 boat trip. Driver didn't speak any English so it's very difficult to communicate. We could have used that time to see more of Valencia.
The bus didn't start running until 10am. So go across the street (about 5 feets) and take the city bus if you get on shore early. It costs only 1.5 Euro. We finished one major stop before the bus arrived that stop! Attention: everywhere you want to see requires entrance fee. It's a beautiful port and worth visiting!
Hop-on hop-off stuff has a desk set right at ship exit, provide city map and give direction on where the stop is. As a matter of fact, that's the only place we see hop-on hop-off stuff. I suggest in every port, same kind of service should be provided.