The ferry going to Twaen Beach on Koh Larn is just to the left then the ferry just to the right goes to Naban or the main Village. The fare for the Koh Larn ferry to both destinations is only 30 Baht for each way. If someone asks you to pay more than 30 Baht then you are probably not at the right boat. You pay just as you board the boat at the kiosk next to where the boat is docked. The Koh Larn Ferries go to both Naban port and Tawean Beach with different departure and arrival times, see schedule. Naban Port is the main village where most people that live on the island have their homes.