 Within the above area, land excluded from the national park includes the following saline lakes which were associated with gypsum mining at the time of proclamation of the national park - Marion Lake, Snow Lake and Spider Lake.As of 2014, the national park included the following "no access" areas (from east to west) - a section of coastline between Cape Spencer and Ethel Beach, South and Middle Islands at the entrance to Pondalowie Bay, Royston Island, the coastline between Royston Head and Dolphin Beach, and the coastline between Browns Beach and Gym Beach.The coastline extending from Willyama Bay to Cape Spencer consists of a number of bays such as Cable Bay and Stenhouse Bay with some prominent headlands such as Rhino Head and a line of cliffs between Cable Bay and Stenhouse Bay.