[3] Situated approximately 15 km (9 mi) west of Denmark, William Bay National Park covers 1,734 ha (4,280 acres)[1] and includes Greens Pool and Elephant Rocks.

The granite boulders create a natural reef which protects Greens Pool from the Great Southern Ocean, and a safe swimming beach for children who are under supervision.

The park also contains areas of peppermint scrub, dense heathland, pockets of karri forest, Eucalyptus woodlands, Parry Inlet, lakes, tall hills with granite tors and outcrops.

[4] Fishing is popular along the rocks and beaches, with many different species found, including King George whiting, herring, Australian salmon and mulloway.

[8] Birds found within the park area and surrounds include several species of honeyeaters, white-breasted robins, red-eared fire tails, western rosella and red-capped parrot.