There are several important landforms on the peninsula : the large area of undisturbed sand dunes on the east coast around Shelburne Bay and Cape Bedford-Cape Flattery ; the huge piles of black granite boulders at Black Mountain National Park and Cape Melville ; and the limestone karsts around Palmerston in the south . There are several outstanding landforms on the peninsula : the large expanses of undisturbed dunefields at the eastern coast around Shelburne Bay and Cape Bedford-Cape Flattery ; the huge piles of black granite boulders at Black Mountain National Park and Cape Melville ; and the limestone karsts around Palmerston in the Capeâ s far south .