Just south of Rotorua is Waiotapu, an active geothermal area. One of the many spectacular things to see in this thermal wonderland is Lady Knox Geyser. It was discovered in the early 20th century. It is induced to erupt daily at 10:15am. At first it is very gradual like the above photograph but after a couple of minutes the jet of water can reach up to 20 metres high and last for over an hour.