Public bus from Monaco to Monaco (city)
There is no bus stop near the cruise port, but you can take bus N° 1 or 2 in Monaco Ville near the Oceanographic Museum and the Cathedral. You can walk there or take the elevator from Parking des Pêcheurs.
Bus N° 1 and 2, make several interesting stops along the main highlights in the city. They run frequently every 10 to 15 minutes and a ticket costs € 1 per person per trip.
TIP: Bus N° 2 also makes a stop at the train station and Office the Tourisme bus stop. This can be useful when you want to travel by train or bus to Nice or Cannes.