Summit Battery (Fort Cautley) is listed as a fortress at 16 Takarunga Rd in Devonport, on Auckland's North Shore. It has a 4.6 rating on Google. It is part of the historic coastal defences on Takarunga / Mount Victoria, one of Devonport's volcanic hills.
A good fortress or historic battery site lets you see how defences were planned, with gun emplacements, tunnels and lookouts, often with signs to explain their purpose. Devonport's hilltop forts were built to guard the Waitematā Harbour, so the views across the harbour and the city are part of the story and show why the site was chosen. Regulars know that the walk up the hill is short but steep, that mornings and late afternoons give the best light, that wind at the summit can be cool even on a warm day and that some tunnels and structures may be closed or unsafe to enter. Wear sturdy shoes, bring water, stay on the paths, keep children close to edges and leave the site as you found it.
For anyone exploring Devonport, Summit Battery at Takarunga Road is a rewarding stop for history and harbour views.