Sequestered 12km down a gravel road from the highway (the turn-off is halfway between Taranna and Port Arthur) is becalmed Fortescue Bay, with a sweeping sandy arc backed by thickly forested slopes. The sheltered bay was one of the semaphore-station sites used during the convict period to relay messages to and from Eaglehawk Neck. Early last century a timber mill was in operation, and the boilers and jetty ruins are still visible near Mill Creek, plus the remains of tramways used to collect the timber. The mill closed in 1952.
Fortescue Bay is one of the main access points for Tasman National Park, encompassing the territory around Cape Raoul, Cape Hauy, Cape Pillar (home to the Three Capes Track), plus Tasman Island and up the rugged coast north to Eaglehawk Neck. Here you'll find the tallest sea cliffs in the southern hemisphere (300m!), while offshore, dolphins, seals, penguins and whales are regular passers-by.