Ryanggang Province
Heaven Lake (Korean: , "Ch'ŏnji" or "Cheonji"; , "Tiānchí"; Manchu: "Tamun omo" or "Tamun juce") is a crater lake on the border between China and North Korea. It lies within a caldera atop the volcanic Paektu Mountain, a part of the Baekdudaegan mountain range and the Changbai mountain range. It is located partly in Ryanggang Province, North Korea, at , and partly in Jilin Province, northeastern China. Heaven Lake has been recognized as the highest volcanic lake in the world by "Guinness Book of Records".