The Huka Falls are a set of waterfalls on the Waikato River that drains Lake Taupo in New Zealand. A few hundred metres upstream from the Huka Falls, the Waikato River narrows from roughly 100 metres across into a narrow canyon only 15 metres across. The canyon is carved into lake floor sediments laid down before Taupo's Oruanui eruption 26,500 years ago.
The volume of water...