Lady Knox Geyser, New Zealand

Jack and Isabel Bain from Brisbane, Queensland, Australia did a round the world post retirement trip in 1966. This photograph shows Lady Knox geyser, New Zealand in October 1966.

The Lady Knox Geyser is a geyser in the Waiotapu area of the Taupo Volcanic Zone in New Zealand. It is named after Lady Constance Knox, the second daughter of Uchter Knox, 15th Governor of New Zealand. The geyser is induced to erupt daily at 10:15 am by dropping a surfactant into the opening of the vent. Eruptions produce a jet of water reaching up to 20m and can last for over an hour, depending on the weather. The visible spout is made of rocks placed around the base of the spring to enhance the eruption; over the years silica from the eruptions has built up to give a white cone-shaped appearance.

Because the geyser was discovered early in the 20th century, it has no Māori name, unlike almost every other thermal feature in New Zealand. (Wikipedia)