At Huka Falls, up to 220,000 litres of water rush through a narrow gorge on the Waikato River each second. Just a handful of thrill-seeking kayakers have navigated the foaming turquoise waters of the falls, which were also the site of a 1989 murder investigation. Archival audio sourced from Radio New Zealand Sound Archives, http://www.soundarchives.co.nz/. Sound files may not be reused without permission from Radio New Zealand Sound Archives (Reference number C89020-7D).