Tianchi Lake or Heaven Lake is a crater lake perched atop the Changbai Mountains in northeast China's Jilin Province. It is believed to be a holy lake by the locals and its scenery varies greatly as the season changes. (Photo: china.org.cn/Courtesy of Changbai Mountain Tourist Administration)

Tianchi Lake or Heaven Lake is a crater lake perched atop the Changbai Mountains in northeast China's Jilin Province. It is believed to be a holy lake by the locals and its scenery varies greatly as the season changes. (Photo: china.org.cn/Courtesy of Changbai Mountain Tourist Administration)