North Head located in the suburb of Devonport boasts a military history dating back to 1855 and the "Russian Scare" and all wars since. As a result and in its present form as a historic reserve it offers many easy walks with amazing views of Auckland and the Hauraki Gulf. Many old above and below ground installations to look at - bring a torch.
There is an excellent cafe at the nearby Torpedo Bay Navy Museum.
Inside one of the many installations that give one a sense the hill is a honey comb.
Tunnel (one of many) carved out of the hillside
Cheltenham Beach (to the north)
View back to the City (to the south-west)
Rangitoto Island and the Hauraki Gulf (to the east)
East facing old gun emplacements - not a bad view for a workplace.
Well worth a visit.