Upo Wetland (includes Upo, Mokpo, Sajipo and Jokjibul) is the biggest natural continent wetland in Korea and is spread over 4 administrative districts of Youeomyun, Ebangmyun, Daehabmyun and Daejimyun of Changyounggun. It is located on 128°25' east and 35°33' north.
In July of 1997, it was designated as Ecological Conservation Area by the Ministry of Environment. In March of 1998, it was registered to Ramsar Convention and is being protected. The area that is designated for ecosystem and view preservation (name change*2) is about 8.54km2 (about 854ha), the area covered by water in Upo Wetland because of summer monsoon or flooding is about 2.314km2 (about 231.4ha).