Wai-o-Tapu (Maori meaning "holy water") is one of Rotorua's most famous geothermal areas, the most famous in the fairyland is the beautiful champagne pool (Champagne Pool, Figure 1), natural minerals make the lake appear rare colorful colors. Mrs. Knox Geyser (Lady Knox Geyser) erupts at 10:15 a.m. every day, with a maximum water column of 20 meters. (Figure 5)