Sydney Heads

HMAS Watson is a Royal Australian Navy (RAN) base on Sydney Harbour at South Head, near Watsons Bay in Sydney, Australia. Commissioned in 1945 (after three years operating as HMAS Radar), the base served as the RAN's radar training school. In 1956, torpedo and anti-submarine warfare training were relocated to the base, and by 2011, Watson was the main maritime warfare training base, as well as providing post-entry education for maritime warfare officers, training for combat system and electronic warfare sailors, and command training.

Hornby Lighthouse, also known as South Head Lower Light or South Head Signal Station, is a heritage-listed active lighthouse located on the tip of South Head, New South Wales, Australia, a headland to the north of the suburb Watsons Bay. It marks the southern entrance to Port Jackson, as well as lighting the South Reef, a ledge of submerged rocks. It is the third oldest lighthouse in New South Wales. Designed by Mortimer Lewis and listed on the (now defunct) Register of the National Estate and on the New South Wales State Heritage Register since 2 April 1999, with the following statement of significance: A dominant Sydney landmark which appears to have been in continuous use since the 1840s as a controlling point for shipping entering and leaving Port Jackson. The building complex, designed by the Colonial Architect Mortimer Lewis in the early 1840s, is an architectural important example of an early Victorian public work associated with port activities.

Watsons Bay is a harbourside, eastern suburb of Sydney, in the state of New South Wales, Australia. Watsons Bay is located 11 km north-east of the Sydney central business district, in the local government area of the Municipality of Woollahra. Watsons Bay sits on the end of the South Head peninsula and takes its name from the sheltered bay and anchorage on its western side, in Port Jackson (Sydney Harbour). It provides views across the harbour to the Sydney Harbour Bridge. The Gap is an ocean cliff on the eastern side with views to Manly at North Head and the Pacific Ocean. Vaucluse is the only adjacent suburb, to the south.

The Sydney Harbour anti-submarine boom net was an anti-torpedo and submarine defence net that was in Sydney Harbour during World War II. It spanned the entire width of the harbour from Laing Point (formerly known as Green Point), Watsons Bay to Georges Head Battery, on the northern side of Sydney Harbour. The boom formed part of the Sydney Harbour defences which also included artillery batteries and patrol boats.

Doyles on the Beach is an Australian seafood restaurant founded in 1885. Located on Marine Parade in Watsons Bay, Sydney, it is Australia's oldest continually running fish and chip shop, currently owned by Michael Doyle. There is both an à la carte restaurant and a garden bar at the Marine Parade establishment. It has two sisters restaurants: Doyles Fishermans Wharf, also in Watsons Bay, and Doyles at the Sydney Fish Market.In 2021, the restaurant was named in GQ's list of the "18 most expensive restaurants in Australia".One of the restaurant's attractions is the view over Sydney Harbour of the downtown Sydney skyline four miles to the east.

Watsons Bay ferry wharf is located on the southern side of Sydney Harbour serving the Sydney suburb of Watsons Bay.

The Gap is an ocean cliff at South Head in the Eastern Suburbs of Sydney, Australia. The area, which faces the Tasman Sea, is located in the suburb of Watsons Bay. Although the cliff is a popular tourist destination, it has an infamy for suicides.

Caroline Byrne (8 October 1970 – 7 June 1995), an Australian model, was found at the bottom of a cliff at The Gap in Sydney in the early hours of 8 June 1995. Her then boyfriend Gordon Eric Wood (b. 1962), who at the time of her death was a chauffeur and personal assistant to businessman Rene Rivkin, was convicted of her murder on 21 November 2008 and spent three years in Goulburn Correctional Centre. He was acquitted of the conviction in February 2012.

Sow and Pigs Reef is a rocky reef in Sydney Harbour, New South Wales, Australia. The reef is situated on the eastern side of the main shipping channel between Middle Head and South Head. It is 150 metres (490 ft) long and up to 70 metres (230 ft) wide. Originally the reef was exposed and resembled a sow and her litter. Explosives were used to reduce the reef, however, and now the reef is only exposed at a very low tide. A number of ships have been wrecked or damaged after hitting the reef.

Eastern Channel Pile Light, also known as the East Wedding Cake due to its shape, is an active pile lighthouse located at the Sydney Harbour, New South Wales, Australia, off Laings Point in the Vaucluse suburb of Sydney. It marks the eastern end of the Sow and Pigs Reef.

Alexandria Parish is one of the 57 parishes of Cumberland County, New South Wales, a cadastral unit for use on land titles. It contains the area to the south and east of Sydney city including Bondi, Paddington and Clovelly. It was probably named after the Battle of Alexandria fought in 1801. The Parish of Alexandria roughly corresponds with the "Eastern Suburbs" in the traditional narrow sense of that term. The "Eastern Suburbs" in a wide sense also includes the suburbs immediately to the south, in the Parish of Botany.

Edward Lombe was a merchantman and passenger three-masted barque built in 1828 by Thomas Brodrick, of Whitby, England.