Nice right off the Ship
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I think most people use this port as a point to get to Nice, Eze, and Monaco. The above thread is decent and has a picture of a beach near where your tender boats dock.
But you may not want to pass up a bus ride to Nice, Eze, or Monaco. It's worth looking through the posts on this board and deciding what suits you best. I don't think you will need a shore excursion when you make your choice.