- Karangahake Gorge was a gold mining boom town 100 years ago; now it is virtually deserted. A few vestiges remain, like a 1.1 kilometre tunnel through solid rock that once contained a narrow gauge railway, and the foundations of stamping batteries that were used to crush the ore-bearing quartz so that gold could be extracted with mercury. The New Zealand Walkway passes through the gorge and tunnel offering spectacular views of the Ohinemuri River, gorge, surrounding mountains and ruins of the mining camps. At Waihi you can arrange tours of the open cast Martha Mine.
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