What is the largest lake in Korea?

There are few lakes in Korea, and the largest natural lake is Bailutan, which is located at the crater on the top of Hanna Mountain in Jeju Island, with an altitude of 1,85m, a diameter of 3m, a circumference of 1km and a depth of 6m. The largest artificial lake is Zhaoyang Lake, which is located 13 kilometers northeast of Chunchuan City, gangwon. It was built in 1973 and covers an area of 69.3 million square meters. In addition, there are some smaller lakes, such as Chaqiao Lake and Mujin Lake.