We could smell the sulfur even before had sighting Rotorua. Here the earth’s crust is thin, making it possible to observe multiple geologic expressions of volcanic activity. Champagne Pool in Wai-o-Tapu Thermal Wonderland is undoubtedly one of the major attractions of this area. A vast boiling green water pool, decorated with a bright orange shore inhabited by thermophilic algae. The boiling water releases gas bubbles like a just opened champagne bottle.