The Champagne Pool; It was formed by a hydrothermal eruption 900 years ago. The crater has a diameter of about 213 feet and the 160 degree Fahrenheit geothermal pool is 230 feet deep. The colours are in part formed by sulfur and arsenic. The waters are the most colorful geothermal area in the New Zealand. It’s known as the Champagne Pool at the Artist’s Palette at the Wai-o-tapu Thermal Wonderland.