Changbai Mountain Tianchi (Yanhai Segment) is the most famous volcanic crater lake in Northeast Asia. The jade-like lake reflects the misty peaks, surrounded by pristine forests, with summer blooming azaleas and winter’s frost and snowfields creating a spectacular contrast. This area is a natural wonder and an ecological treasure, featuring unique cold-water fish, endangered plants like the Yuehua Forest (Jade Birch), and the underground river and Tianchi Waterfall.