Te Pōrere Redoubt is the earthworks of a Maori fortification built by the prophet and warrior Te Kooti; the last major engagement of the New Zealand Wars was fought here in October 1869. The redoubts are an example of the Māori adaptation of classic British military construction techniques. Given they are almost 150 years old they are in remarkable condition. Standing in the trenches you can almost picture the battles.
The walk to the lower redoubt is an easy 5 minutes. The walk to the upper one is a bit more strenuous, while it's not far, it's quite steep in some places but well worth the effort.