HMAS Penguin (naval base)

Georges Heights is an urban locality in the suburb of Mosman, adjoining Sydney, in the state of New South Wales, Australia. Georges Heights is located in the local government area of the Municipality of Mosman and is part of the Lower North Shore.

The Lower Georges Heights Commanding Position is located in the urban locality of Georges Heights in the suburb of Mosman, on the shores of Port Jackson, Sydney, New South Wales, Australia. The Lower Georges Heights Commanding Position was constructed and designed to stop enemy ships from entering into Sydney Harbour, and worked in conjunction with several others forts located within close proximity.

Willoughby Parish, Cumberland is one of the 57 parishes of Cumberland County, New South Wales, Australia, a cadastral unit for use on land titles. The suburb of Willoughby and the City of Willoughby LGA are in a similar area. Willoughby Parish roughly covers the peninsula formed by the Lane Cove River, Sydney Harbour and Middle Harbour on three sides, with the northern boundary of the Parish roughly across the narrowest point of the peninsula (where the Lane Cove River comes closest to Middle Harbour). It roughly correlates with the region traditionally known as the "Lower North Shore", although that term is also sometimes used in a wider sense that includes land in neighbouring Hunters Hill Parish.

The Georges Head Battery, also called the Georges Head Military Fortifications, is a heritage-listed former military fortification located on the Georges Head on Chowder Bay Road, Georges Heights, New South Wales, Australia.The site consists of the original battery and barracks, designed by Colonial Architect James Barnet, located at the end of Suakin Drive, Georges Heights, two later batteries located adjacent to the corner of Middle Head Road and Best Avenue, Georges Heights, and the Beehive (or Lower) Casemate adjacent to the Armoured (or Upper) Casemate in Chowder Bay Road. The Georges Head Battery is one of three forts in the area that were built for the purpose of defending the outer harbour. The other two forts are located at Middle Head and Bradleys Head, Mosman. The fort became a command post in the 1890s for the coordination of all of Sydney's harbour defences. It was decommissioned in 2002 and part of the land is managed by the Sydney Harbour Federation Trust, with other parts managed by the NSW National Parks & Wildlife Service as part of the Sydney Harbour National Park. The property is owned by Office of Environment & Heritage. The site was added to the New South Wales State Heritage Register on 2 April 1999.

The Rotunda is located in Balmoral Beach Reserve at Balmoral Beach, Sydney. It was built in 1930 as part of the beach improvement program undertaken by Mosman Council. Overlooking the bay and close to Rocky Point Island, it is set in a very picturesque area. After its completion it was a very popular venue for brass band concerts for many years throughout the 1930s and 1940s. Today it is used for festivals, events and weddings and is an important historical landmark in Balmoral.

The Balmoral Bathers Pavilion is a heritage-listed former bathers' pavilion and now retail building, cafe and restaurant located at The Esplanade, Balmoral in the Mosman Council local government area of New South Wales, Australia. It was designed by Alfred H. Hale, the Mosman Council Architect and Building Surveyor and built from 1928 to 1929 by Girvan Brothers, Master Builders. The property is owned by Mosman Council. It was added to the New South Wales State Heritage Register on 2 April 1999.

The Middle Head Fortifications is a heritage-listed former defence establishment and military fortifications and now public space located at Middle Head Road, Middle Head, Mosman in the Mosman Council local government area of New South Wales, Australia. It is also known as the Middle Head Military Fortifications or The Old Fort. The fortifications consist of the Outer Middle Head Battery located at the end of Old Fort Road, the Inner Middle Head Battery located at the end of Governors Road, and the Obelisk batteries reached by a path from the corner of Middle Head Road and Chowder Bay Road. The fortifications at Middle Head formed part of Sydney Harbour's defences. The property is owned by the Department of Planning and Environment. It was added to the New South Wales State Heritage Register on 2 April 1999.

Beehive Casemate is a historical fortification located on the banks of Obelisk Bay, in Sydney Harbour, New South Wales, Australia. It is part of the Sydney Harbour National Park.

Mosman Council is a local government area on the Lower North Shore of Sydney, New South Wales, Australia. The mayor of Mosman Council is Cr. Carolyn Corrigan, a representative of the Serving Mosman independent political group since 9 September 2017.

Grotto Point Light, also known as Port Jackson Entrance Range Front Light, is an active lighthouse located at Grotto Point, a rocky headland at the southernmost tip of Balgowlah Heights, New South Wales, Australia, on the north side of Sydney Harbour. It serves as the front range light, Rosherville Light serving as the rear light, into Port Jackson. Rosherville Light is located almost exactly 1 mile (1.6 km) (1,690 yards (1,550 m) to be exact) behind Grotto Point Light.

Queenwood School for Girls, often abbreviated as Queenwood, is a multi-campus independent non-denominational Christian primary and secondary day school for girls, located in the suburb of Mosman, on the Lower North Shore of Sydney, New South Wales, Australia. Established in 1925 by Miss Grace Lawrance (who was an alumna of Wenona) and named after the Queenwood Ladies' College in East Sussex, Queenwood has a non-selective enrolment policy and currently caters for approximately 1,000 students from Kindergarten to Year 12. The school is affiliated with the Association of Heads of Independent Schools of Australia (AHISA), the Alliance of Girls' Schools Australasia, and is a member of the Association of Heads of Independent Girls' Schools (AHIGS).

Sydney Harbour was protected by coastal batteries and other fixed defences from the early 19th century until the 1960s. These defences were constructed to protect the Australian city of Sydney from attack by enemy warships and submarines.