Daxing'anling Tianchi

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　　  Tianchi, namely Daxing'anling Tianchi, is one of China’s six renowned tianchi (heavenly lakes). It is located on Tianchi Ridge, 74 kilometers northeast of Arxan City, within the Arxan National Forest Park. Formed by a volcanic eruption during the Late Pleistocene period of the Quaternary age, it is a crater lake formed from water accumulating in the volcanic crater. With an elevation only lower than that of the Baekdu Mountain Tianchi in Jilin Province and the Bogda Peak Tianchi of the Tianshan Mountains in Xinjiang, it ranks as the third highest tianchi in China. If considering only crater lake origins, Daxing'anling Tianchi ranks second.

　　 The tianchi sits at an elevation of 1,332 meters, with a relative height of 18 meters, taking the shape of a truncated circular volcanic cone. The crater is surrounded by basalt, and the lake is shaped like a round cauldron. The circular shoreline terrace around the lake, composed of basalt, is about 10 meters wide and 1–3 meters high. The lake surface is oval-shaped, stretching 450 meters from east to west and 300 meters from north to south, covering an area of 13.5 hectares. Its waters remain full even in droughts and never overflow in floods. The surface is mirror-like, reflecting the blue sky, white clouds, green trees, and blue mountains, presenting a breathtaking view. During spring and summer transitions, the mountain air is thick with moisture, creating a sea of clouds. The mountaintop is often veiled in light mist, with dense stands of pine and birch encircling the lake, forming a natural masterpiece.