Middle Head looks out through North and South Heads to the Tasman Sea. It lies at the junction between North Harbour, Port Jackson and Middle Harbour.

Middle Head is home to Obelisk Beach and Cobblers Beach as well as the HMAS Penguin naval base.

At Georges and Middle heads, you can see 150 years of military improvements. Back in the Napoleonic Wars (1805-15), a sandstone parapet was cut into the rock to ward off a feared French invasion. Then a series of interlinking tunnels and passageways were excavated after the withdrawal of British colonial troops garrisoned in Sydney.

The defences continued to be upgraded, and during the Second World War, guns were installed. You can still see the gun emplacements - and the remains of earlier fortifications - on a walk around the headlands.