hastily constructed, but later expanded and strengthened over 25 years by convict labor of up to 40 prisoners living in a barracks on the hilltop. The prisoners added extensive tunnel systems, underground store rooms, and various observation posts. The armaments of the fort included 64-pounder Armstrong disappearing guns, searchlights, and a remote-detonated naval minefield across the inner harbour to Bastion Point. None of the armaments were ever used in anger. A four-gun memorial saluting battery of 18-pounder World War I field guns was used, among other occasions, to salute Queen Elizabeth II on her visit in 1953. In the 1930s, part of the fort received modernisation. Then during World War II, it became the administrative centre of Auckland's coast defenses, with the regimental headquarters buildings still surviving today. The coastal defences were scrapped in 1950, though one of the disappearing guns remained behind – obsolete and too difficult for the scrap merchant who bought it to disassemble and remove. After the army had left, the area was turned into a reserve again, though the New Zealand Navy kept an area around the summit for a training school. Modern use Since the Navy school left the summit area in 1996, the Department of Conservation has administered the area as a reserve, which provides for beautiful walks along the waterline or onto the summit with good views of Rangitoto Island and Auckland due to the prominent height of the hill. Also popular are exploratory forays to the gun emplacements and into the tunnel system, which is open to the public to a substantial degree, though torches are needed to explore it. In the late 1980s and early 1990s there were reports of strange chemical smells and rumours of hidden caverns underneath the hill. Some tales even told of airplanes hidden in secret storerooms. As it was feared that old ammunition was decaying in forgotten parts of the fortifications, a major investigation was started, involving documentary research, geological tests and substantial exploratory digging was done around the hill. The research however, found little of new import. Treaty settlement In the 2014 Treaty of Waitangi settlement between the Crown and the Ngā Mana Whenua o Tāmaki Makaurau collective of 13 Auckland iwi and hapu (also known as the Tāmaki Collective), ownership of the 14 Tūpuna Maunga (ancestral mountains) of Tāmaki Makaurau / Auckland, was vested to the collective, including the volcano officially named Maungauika.