FYI:
currently ALL costa European cruises will not allow passengers off the ship at any ports in Europe unless passenger is on a COSTA tour. No individual passenger exploration, no NON-costa tours. This is a Costa rule except for Italy in which it is an Italian rule.
Not transparent enough on Costa site but it is indicated here. Their website should be more transparent particularly when their phone lines are never open on a weekend which would enable potential passengers to ask question and not waste time considering cruise options.
https://www.costacruises.com/cruisin...above-all.html