(Tourism New Zealand) Coolest Underground Activities: Try black water rafting (Adventure hotspot New Zealand has white water rafting nailed, but for something a little different, try black water rafting through underground caves. Also known as cave tubing, black water rafting takes adrenalin junkies down a river in the Waitomo Caves on an inflated rubber tube. The attraction offers the best of backwater rafting organised by the Black Water Rafting Company, with caving, tubing, climbing…
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