Royal Australian Navy Heritage Centre

The Garden Island Tunnel System, also known as Garden Island tunnels, Garden Island Tunnel Complex and Potts Point Tunnels, is a former tunnel warfare system in Garden Island, Sydney, Australia. Used in World War II by the Royal Australian Navy in 1941, the tunnels were dug from sandstone beneath Potts Point after the Japanese attacked Pearl Harbor, to shelter the men working at the naval base from air raids. Some of the tunnels feature names such as Petticoat Lane (named after London's landmark), North-West Passage and Lambeth Walk.The tunnel system featured a power station, a command centre, offices and air raid shelters. Today, the tunnels and chambers are used for electrical wiring and communications.

Garden Island ferry wharf is located on the southern side of Sydney Harbour. It serves the Royal Australian Navy's Heritage Centre, Garden Island.

The Garden Island Naval Chapel is a heritage-listed non-denominational Christian chapel located in the heritage-listed Garden Island Naval Precinct that comprises a naval base and dockyard in the inner eastern Sydney suburb of Garden Island in the City of Sydney local government area of New South Wales, Australia. Housed in a building designed by James Barnet and built between built 1886 and 1887, the chapel was established in 1902 after conversion from the former sail loft and is the oldest Christian chapel of the Royal Australian Navy (RAN) and has stained glass windows and plaques from that era to the present. The chapel was added to the Commonwealth Heritage List on 22 June 2004 and the New South Wales State Heritage Register on 12 November 2004.The building is the oldest on Garden Island, two-storey, built of stuccoed brick with stone sills, arches and columns. The original loft floor of timber remains, caulked with oakum and bitumen.

Port Jackson or Sydney Harbour is the ria or natural harbour of Sydney, New South Wales, Australia. The harbour is an inlet of the Tasman Sea (part of the South Pacific Ocean). It is the location of the Sydney Opera House and Sydney Harbour Bridge. The location of the first European settlement and colony on the Australian mainland, Port Jackson has continued to play a key role in the history and development of Sydney. Port Jackson, in the early days of the colony, was also used as a shorthand for Sydney and its environs. Thus, many botanists, see, e.g, Robert Brown's Prodromus Florae Novae Hollandiae et Insulae Van Diemen, described their specimens as having been collected at Port Jackson. Many recreational events are based on or around the harbour itself, particularly Sydney New Year's Eve celebrations. The harbour is also the starting point of the Sydney to Hobart Yacht Race. The waterways of Port Jackson are managed by Transport for NSW. Sydney Harbour National Park protects a number of islands and foreshore areas, swimming spots, bushwalking tracks and picnic areas.

In late May and early June 1942, during World War II, submarines belonging to the Imperial Japanese Navy made a series of attacks on the Australian cities of Sydney and Newcastle. On the night of 31 May – 1 June, three Ko-hyoteki-class midget submarines, (M-14, M-21 and M-24) each with a two-member crew, entered Sydney Harbour, avoided the partially constructed Sydney Harbour anti-submarine boom net, and attempted to sink Allied warships. Two of the midget submarines were detected and attacked before they could engage any Allied vessels. The crew of M-14 scuttled their submarine, whilst M-21 was successfully attacked and sunk. The crew of M-21 killed themselves. These submarines were later recovered by the Allies. The third submarine attempted to torpedo the heavy cruiser USS Chicago, but instead sank the converted ferry HMAS Kuttabul, killing 21 sailors. This midget submarine's fate was unknown until 2006, when amateur scuba divers discovered the wreck off Sydney's northern beaches. Immediately following the raid, the five Japanese fleet submarines that carried the midget submarines to Australia embarked on a campaign to disrupt merchant shipping in eastern Australian waters. Over the next month, the submarines attacked at least seven merchant vessels, sinking three ships and killing 50 sailors. During this period, between midnight and 02:30 on 8 June, two of the submarines bombarded the ports of Sydney and Newcastle. The midget submarine attacks and subsequent bombardments are among the best-known examples of Axis naval activity in Australian waters during World War II, and are the only occasion in history when either city has come under attack. The physical effects were slight: the Japanese had intended to destroy several major warships, but sank only an unarmed depot ship and failed to damage any significant targets during the bombardments. The main impact was psychological; creating popular fear of an impending Japanese invasion and forcing the Australian military to upgrade defences, including the commencement of convoy operations to protect merchant shipping.

HMAS Kuttabul is a Royal Australian Navy (RAN) base located in Potts Point in Sydney, New South Wales, Australia. Kuttabul provides administrative, training, logistics and accommodation support to naval personnel assigned to the various facilities that form Fleet Base East, the main operational navy base on the east coast of Australia. A part of Fleet Base East itself, Kuttabul occupies several buildings in the Sydney suburb of Potts Point and in the immediately adjacent Garden Island dockyard. It also supports navy personnel posted to other locations throughout the greater Sydney region.The base is named for the steam ferry HMAS Kuttabul that was sunk while docked at Garden Island during a Japanese midget submarine attack on Sydney Harbour in 1942.

Fort Denison Light, also known as Pinchgut Light, is an active lighthouse located on top of a Martello Tower at Fort Denison, a former penal site and defensive facility occupying a small island in Sydney Harbour, New South Wales, Australia. The island is located downstream from the Harbour Bridge near Potts Point and the Royal Botanic Gardens. The fort is also known as "Pinchgut" lending its name to the light.

Fort Denison, part of the Sydney Harbour National Park, is a protected national park that is a heritage-listed former penal site and defensive facility occupying a small island located north-east of the Royal Botanic Gardens and approximately 1 kilometre (0.62 mi) east of the Opera House in Sydney Harbour, New South Wales, Australia. The island is also known as Mattewanye/Muddawahnyuh, in the Eora language (Sydney Language), and as Pinchgut Island. The site contains time gun, navigational aids and tide gauge facilities. Correctional and military facilities were designed by George Barney and built from 1840 to 1862 by William Randle. The property is owned by the NSW Office of Environment and Heritage, an agency of the Government of New South Wales. It was added to the New South Wales State Heritage Register on 2 April 1999. In 1978 the former fortress was listed on the (now defunct) Register of the National Estate, and is currently used as a national park, nature reserve, tourist facility, and as a function space.

The Fleet Base East is a Royal Australian Navy (RAN) major fleet base that comprises several naval establishments and facilities clustered around Sydney Harbour, centred on HMAS Kuttabul. The Fleet Base East extends beyond the borders of Kuttabul and includes the commercially-operated dockyard at Garden Island, and adjacent wharf facilities at nearby Woolloomooloo, east of the Sydney central business district in New South Wales, Australia. Fleet Base East is one of two major facilities of the RAN, the other facility being the Fleet Base West. The fleet operates in the Pacific Ocean. Confusingly, naval personnel often use the term Fleet Base East to mean the naval wharves at Garden Island where ships assigned to the Fleet Base usually berth but the official designation includes several other bases and facilities as well.

The Garden Island Naval Precinct is a heritage-listed naval base and defence precinct located at Cowper Wharf Roadway in the inner eastern Sydney neighbourhood of Garden Island in the City of Sydney local government area of New South Wales, Australia. The precinct was built from 1856. It includes the HMAS Kuttabul naval base, formerly known as HMAS Penguin. The property is owned by Australian Department of Defence. It was added to the Commonwealth Heritage List on 22 June 2004 and the New South Wales State Heritage Register on 12 November 2004.

Iserbrook was a general cargo and passenger brig built in 1853 at Hamburg (Germany) for Joh. Ces. Godeffroy & Sohn. It spent over twenty years as an immigrant and general cargo vessel, transporting passengers from Hamburg to South Africa, Australia and Chile, as well as servicing its owner's business in the Pacific. Later on, the vessel came into Australian possession and continued sailing for the Pacific trade. In 1878 it caught fire and was sunk the same year. At last, it was re-floated and used as a transport barge and hulk in Sydney until it sank again and finally was blown up.

Mrs Macquarie's Chair (also known as Lady Macquarie's Chair) is an exposed sandstone rock cut into the shape of a bench, on a peninsula in Sydney Harbour. It was hand carved by convicts in 1810, for Elizabeth Macquarie, the wife of Major-General Lachlan Macquarie, Governor of New South Wales. The peninsula itself was known to the Gadigal as Yurong Point, and is now widely known as Mrs Macquarie's Point, and is part of The Domain, near the Royal Botanic Gardens.