Brisbane Water National Park in the context of "Daytime"

Brisbane Water is a wave-dominated barrier estuary located in the Central Coast region of New South Wales, Australia. Brisbane Water has its origin at the confluence of the Narara and Coorumbine Creeks, to the south–east of Gosford and travels for approximately 18 kilometres (11 mi) in a southerly direction to its mouth at Broken Bay, about 7 kilometres (4.3 mi) from the Tasman Sea, at Barrenjoey Head. A number of towns and suburbs surround the shores of Brisbane Water, including Blackwall, Booker Bay, Davistown, Empire Bay, Erina, Ettalong Beach, Gosford, Green Point, Hardys Bay, Kilcare, Kincumber, Koolewong, Phegans Bay, Point Frederick, Point Clare, Saratoga, Tascott, Wagstaffe, and Woy Woy. Contained within Brisbane Water is St Huberts Island, Rileys Island, Dunmar Island and Pelican Island; and adjoining the estuary is Brisbane Water National Park to the west and Bouddi National Park to the east. Forming part of the same tidal estuary system is a separate but connected basin, the Kincumber Broadwater, lying to the east of Davistown.

The total catchment area of the river is approximately 165 square kilometres (64 sq mi).

Lion Island is an island that is located at the mouth to the Hawkesbury River in Broken Bay on the Central Coast of the state of New South Wales, Australia. The island is located just off Pearl Beach and is part of the Central Coast Council local government area.

The island is a descriptive name because it resembles a Sphinx, a mythical figure of a crouching lion. Lion Island is part of the Brisbane Water National Park, as it being one of the two islands located within the national park along with Spectacle Island in the Hawkesbury River.

Spectacle Island is a 36.4-hectare (89.9-acre) island in the village of Mooney Mooney that is located in the Hawkesbury River on the Central Coast of New South Wales, Australia. Spectacle Island is located on the junction with Mooney Mooney Creek and the Hawkesbury River.

Spectacle Island is one of the two islands located in Mooney Mooney along with Peat Island. It is considered a protected nature reserve precinct and is part of the Brisbane Water National Park.