Kauri Trail in Kauaeranga Valley
This is a very interesting hike of about 7 hours. The return can be made on a slightly longer but very interesting road. Here you will pass the the ruins of a railway built to carry Kauri tree trunks.
One should carry plenty of water as it can get very hot, however the reward is a a spectacular 360 degree view from the top of the summit. The summit is reached after climbing an iron staircase and iron hooks attached to the rocks.