Olbia is called the gateway to Costa Smeralda. Due to its favorable location and ferry and airport, the city sees many visitors.
The town itself offers nothing spectaculars. It is definitely nice to look around, but try to visit nature areas and Costa Smeralda. Nothing similar can be found in Sardinia. Go to the beaches of Pittulongu or visit the nearby Porto Cervo.
A visit to the city of Olbia takes 1-2 hours. Depending on your schedule, you can first make an excursion outside of the city and get a little taste of Olbia on your way back. However, the city itself is not that spectacular.
Popular ports for an excursion to Olbia are: