Karangahake Gorge, Windows Walk

We have driven through the Karangahake Gorge numerous times but never stopped to do any of the walks, until last weekend.  I highly recommend it.  The walk we did, "The Windows Walk" involved a mine tunnel which had large windows in it, from which you could see out down the gorge to the river below.  (This gorge was not the main Karangahake Gorge, but a side one.)  Torch required.  At the end of the tunnel you can go down a series of steps to river level, go across a swing bridge and return along a narrow ledge (with railing) of the gorge.  The whole walk took about an hour.  The orange colour on the rocks is a lichen.