Wai-O-Tapu, meaning “Sacred Waters” in Maori is a geothermal area nearby Rotorua, in New-Zealand.
The Champagne Pool was formed 900 years ago by a hydrothermal eruption, is a 65 meters in diameter, is 62 meters deep and contains 50000 m³ of water. The deep water reaches 260°C and gets colder to 75°C on the surface thanks to the contact with air.
The orange colour originates from deposits of metalloid compounds in the water.