Geology and limnology
The caldera which contains Heaven Lake was created by a major eruption in 969 AD (± 20 years).
The lake has a surface elevation of 2,189.1 m (7,182 ft). The lake covers an area of 9.82 km² (3.79 sq mi) with a south-north length of 4.85 km (3.01 mi) and east-west length of 3.35 kilometres (2.08 mi). The average depth of the lake is 213 m (699 ft) and maximum depth of 384 m (1,260 ft). From mid-October to mid-June, it is typically covered with ice.
Names and legends
In North Korean legend, Kim Jong-il is claimed to have been born near the lake on the mountain.
Lake Tianchi Monster
Шаблон:Main Many believe that the lake is home to the Lake Tianchi Monster. It is unknown if the monster and legendary Kun are related.
On September 6, 2007, Zhuo Yongsheng (director of a TV station's news center run by the administration office of the nature reserve at Mount Changbaishan, Jilin), shot a 20-minute video of 6 seal-like, finned "Lake Tianchi Monsters", near the border with the Democratic People's Republic of Korea (DPRK). He sent pictures of the Loch Ness-type creatures to Xinhua's Jilin provincial bureau. One of them showed the creatures swimming in 3 pairs, in parallel. Another showed them together, leaving ripples on the volcanic lake.
- Korean peninsula