The ancient city is not big. It is worth a visit for about two hours. From Hull, I took the bus to and from 18 euros to(Porvoo Likenne), 9 euros a way. The price of different companies will be different. There are many classes a day, so you can choose the cheap class. When Yuyu comes back, go to another company. Asked 15 euros, only to find that it is a different company, get off the bus to see the schedule, nine euros as long as wait 15 minutes, so sit down.