Hawkesbury River

Broken Bay, a semi-mature tide-dominated drowned valley estuary, is a large inlet of the Tasman Sea located about 50 kilometres (31 mi) north of Sydney central business district on the coast of New South Wales, Australia; being one of the bodies of water that separate greater Metropolitan Sydney from the Central Coast. Broken Bay is the first major bay north of Sydney Harbour. Broken Bay has its origin at the confluence of the Hawkesbury River, Pittwater, and Brisbane Water and flows openly into the Tasman Sea. The total surface area of the bay is approximately 17.1 square kilometres (6.6 sq mi).

Lion Island is a river island that is located at the mouth to the Hawkesbury River inside Broken Bay, in the state of New South Wales, Australia. The island is considered part of the Central Coast Council. It is a descriptive name because it resembles a Sphinx, a mythical figure of a crouching lion.

Flint & Steel Guesthouse was situated on Broken Bay, north of Sydney, Australia. It was constructed from 1920 to 1965. The guesthouse and nearby waterways were resumed by the navy during the second world war. Navy personnel at nearby Hungry Beach were known to have frequented "Flint & Steel". The guesthouse was destroyed by fire in 1971.

Pittwater is a semi-mature tide dominated drowned valley estuary, located about 40 kilometres (25 mi) north of the Sydney central business district, New South Wales, Australia; being one of the bodies of water that separate greater Metropolitan Sydney from the Central Coast. Pittwater has its origin from the confluence of McCarrs Creek, to the west of Church Point and a number of smaller estuaries, the largest of which is Cahill Creek, that joins the Pittwater north of Mona Vale. The Pittwater is an open body of water, often considered a bay or harbour, that flows north towards its mouth into Broken Bay, between West Head and Barrenjoey Head, less than 1 kilometre (0.62 mi) from the Tasman Sea. The total area of the Pittwater is 18.4 square kilometres (7.1 sq mi) and around ninety percent of the area is generally administered by the Hawkesbury–Nepean Catchment Management Authority, in conjunction with Northern Beaches Council. The land adjacent to the Pittwater was occupied for many thousands of years by the Kuringgai peoples, an Aboriginal Australian grouping of uncertain origin. They used the river as an important source of food and a place for trade.Pittwater was named Pitt Water in 1788 in honour of William Pitt the Younger, the then Prime Minister of the United Kingdom.

Pearl Beach is a suburb of Central Coast Council on the Central Coast of New South Wales, Australia. Pearl Beach was assigned 'suburb' status by the Geographical Names Board of NSW on 25 October 1991.

Great Mackerel Beach is a suburb about 43 kilometres north of the Sydney central business district, from 2016 in the local government area of Northern Beaches Council, Sydney, New South Wales, Australia, formerly part of Pittwater Council. It is on the western shores of Pittwater in Ku-ring-gai Chase National Park, beside Currawong Beach, and near Coasters Retreat and Palm Beach.The resident population was 50 at the 2021 census; the median age was 57, with an average of 0.3 children per family and an average of 1.7 people per household. The population was 36 at the 2016 census, 301 at the 2011 census, and 103 in 2006. As of 2021 there were 111 private dwellings, with many people not listed as residents occupying properties during school holidays and weekends. Great Mackerel Beach is frequently referred to as Mackerel Beach or [Great] Mackeral Beach, although the spelling "Mackerel" is becoming standard.A nearby beach is called Little Mackerel Beach, often referred to as Currawong Beach.

Hungry Beach is situated beside Cowan Creek and the Hawkesbury River in Ku-ring-gai Chase National Park in the northern part of Sydney, Australia.The north facing beach is about one kilometre from the ruins of the Flint & Steel Guesthouse. The beach is protected by steep cliffs. Above the beach are caves and middens, and a small densely vegetated gully with a fresh water stream. Access to the beach is by private boat; there is no formal bushwalking track but the beach can be reached by foot from Flint and Steel Bay.Hungry Beach was known as a fishing area, particularly for shark, turtle and mulloway. In 1936, The Sydney Mail reported that an indigenous man was shot dead by shark fishermen at Hungry Beach. The newspaper says he was the last surviving member of the Barrenjoey people. In 1899, the wreckage of the steam launch "Hatte", lying on Hungry Beach was sold for £25.The beach allegedly gets its name from a fisherman who became hungry, waiting for three days for a large shark to leave the area. Previously, the shark attacked his rowboat while fishing.

The Currawong Workers' Holiday Camp is a heritage-listed former farm and now workers' holiday camp located at Currawong Beach, New South Wales, Australia. It was designed by various parties including the Van Dyke Brothers, Hudsen's Homes and built in 1950. The property is also known as Little Mackerel, Labor Council's Holiday Resort, Unions NSW Currawong Holiday Cottages, and Midholme and Coaster's Retreat. The property is Crown land and owned by the Government of New South Wales. The property was added to the New South Wales State Heritage Register on 12 May 2009.

Currawong Beach is a suburb in northern Sydney, in the state of New South Wales, Australia. Currawong Beach is 42 kilometres (26 mi) north of the Sydney central business district, in the local government area of Northern Beaches Council.Currawong Beach is located on the edge of Ku-ring-gai Chase National Park, on the western shores of Pittwater, beside Great Mackerel Beach and north of The Basin. Coasters Retreat and Palm Beach are located nearby.

Palm Beach Water Airport (IATA: LBH) is a water aerodrome used by seaplanes. It is located in the suburb of Palm Beach, Sydney, New South Wales, Australia.

The Barrenjoey Head Lighthouse is a heritage-listed lighthouse at Barrenjoey Headland, Palm Beach, Northern Beaches Council in Sydney, New South Wales, Australia. It was designed by James Barnet, the New South Wales Colonial Architect and built by Isaac Banks. It is also known as Barrenjoey Head Lightstation. The property is owned by Office of Environment and Heritage, an agency of the Government of New South Wales. The lightstation was added to the New South Wales State Heritage Register on 2 April 1999. Completed in 1881, the current lighthouse is the third light constructed on the Barrenjoey headland in the Northern Beaches district of Sydney. The light is automated and operated by Transport for NSW; while the buildings and headland are managed by the NSW National Parks & Wildlife Service as part of Ku-ring-gai Chase National Park.

Adelaide was a wooden cutter used in the cedar trade that was wrecked and lost off the Hawkesbury River in Broken Bay, New South Wales, in July 1837 while carrying a load of cedar. The wreck has not been located, but a vessel of its description was reported capsized between Cabbage Tree Bay and Bird Island at approximately 33.6°S 151.3°E.