Lava has created a volcanic eruption, called One Tree Hill, a.k.a. Maungakiekie. It was erupting to 20,000 or 30,000,years, it is also a famous Auckland landmark.
The spectacular view at the top tells you, the dead men at war worked hard. Also you can look at some of the volcanoes in the area of New Zealand.
As you were climbing to the top of the hill, you can look down and see the three craters, that shows you how the side is blown up. The scoria rocks were great for ancient use, and the mouth of the lava is shaped like an horse shoe. Whats more the person who made volcanoes was a man called volcan, and now his name is still remembered for all the maori ancestors.