Situated 17km from Dapoli, Harnai Port consists of two forts - Suvarnadurg and Kanakdurga. Kanakdurga is the land fort while Suvarnadurg is the sea fort.
It was built in the Adil Shah rule and later captured by Chatrapati Shivaji Maharaj. Earlier there was a route connecting both the fort but now it can only be accessed by boat, however, there is no boat service to the fort and one has to ask the fisherman for ferry.