Named for Lady Constance Knox, a daughter of the 15th governor of New Zealand, Lady Knox Geyser is located in the North Island's Taupo Volcanic Zone. While this region is famous for a variety of fascinating geological phenomena, the Lady Knox Geyser is unique. Every day it erupts at precisely 10:15am, when a park guide induces it to do so - with soap.
Indeed, the soap is used to break the surface tension of the cold water in the geyser's upper chamber so that it will mix with the hot water in the lower chamber, which causes an 20 meter (65 feet) eruption that can last an hour. Stones have been placed around the opening in order to enhance the blast, and over the years, silica in the water has given the spout a nozzle-like appearance. You'll find it among the other natural marvels of the Wai-O-Tapu Thermal Wonderland.
Latest Reviews
Review by Alexsandro L, May 2013
Doing what: Rotorua Eco Thermal Small Group Morning Tour
Huru is the guide, and he is very friendly person! The tour is not so cheap, but there was just 3 people in his van! You can do this trip by yourself, but isnt the same with guide!
Review by Andrew G, February 2013
Doing what: Rotorua Eco Thermal Small Group Morning Tour
Fantastic tour with excellent guide Horu Spectacularly beautiful and the highlight of our all but too brif week in NZ
Review by Katherine S, February 2013
Doing what: Rotorua Eco Thermal Small Group Morning Tour
Really excellent. Our guide had a broad knowledge, not only of the geology of the area and the history of volcanic activity, but also of how Maori people would have used the natural resources (and of 'Lord of the Rings' filming location!) Richly illuminating experience.
Unlike many of the other thermal features of the area, the Lady Knox Geyser does not have a Maori name because it was discovered in the early 20th century - by prisoners who were washing their clothes. They triggered the jet when they dropped some soap in with the hot water!



