Middle Head

Middle Head, also known as Gubbuh Gubbuh, is a sandstone headland at Mosman on Sydney Harbour in New South Wales, within Sydney Harbour National Park. It is notable for its well-preserved coastal fortifications dating from the 1870s to World War II, including gun emplacements, tunnels and barracks. The headland offers harbour views, bushland walking tracks and historic military heritage, making it a significant natural and historic visitor site.

Visitors can explore a bush-covered harbour headland with historic military fortifications, including gun pits, underground tunnels, barracks and defensive walls. Paved and natural walking tracks loop through native bushland to cliff-top lookouts with views across Sydney Harbour to North Head, South Head and the city skyline. The site includes interpretive signage, picnic areas and open lawns near HMAS Penguin, with a quiet natural setting close to central Sydney.

Middle Head has been a key part of Sydney Harbour's coastal defence system since the 1870s. Inner Middle Head Fort and Outer Middle Head Battery were developed to protect the harbour, with further expansion during the late 19th century and both World Wars, including gun emplacements, tunnels, barracks and a defensive ditch. The fortifications illustrate the evolution of Australian coastal defence technology and are preserved within Sydney Harbour National Park.

The headland is known by its Aboriginal dual name Gubbuh Gubbuh and lies on Cammeraygal Country. It holds significance for its Aboriginal heritage and as a historic military landscape that reflects Sydney's harbour defence heritage. Today it is valued as a public reserve combining natural bushland, harbour scenery and heritage interpretation.