Heaven pond in Red Rocks National Geopark. It is located in Guzhang County of central China's Hunan Province. As China's only red carbonate rock forest, its history could be traced back 450 million years ago. At the time, the seabed of the ancient Yangtze was covered with carbonate blended with sand. It was then raised due to crustal movement. It became the current shape through long-term weathering, water erosion and melting. [CnDG by Jiao Meng]

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