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A visitor views the Wai-O-Tapu thermal wonderland in Rotorua, New Zealand, Jan. 3, 2020. The Wai-O-Tapu thermal wonderland is part of a scenic reserve covering about 18 square kilometres. Formed approximately 160,000 years ago, it's covered with collapsed craters, cold and boiling pools of mud, water and steaming fumaroles. Due to different mineral compositions, the pool water in the park present different colors such as green, red, yellow and bronze. (Xinhua/Guo Lei)
