Cagliari is a beautiful. There's lots to see and experience. Check out the Old City, as well as getting something to eat and drink (so many eateries to enjoy). If you are porting here, there's lots to do within walking distance of the Porto di Cagliari.
If you're cruising and stopping at this port, you'll need to take a shuttle to the city. You cannot walk from the dock to the city proper. Fortunately, the shuttle is FREE and a short ride (5 minutes tops).
When you're returning to the ship, the shuttle is still FREE. There is a pedestrian area where people can wait for the shuttles. IMPORTANT TIP: Make sure you know when the last shuttle runs (they don't run late FYI - the day I was there, the last shuttle was 7pm or 19:00). read more