Hantan-River Geopark is the first geopark in Korea to be formed with a river as its' center. It includes Hantan-river, which rises from Pyonggang-gun of North Korea, and also the overlap area of the Imjin-river, located in the lower course of Hantan-river. The Hantan-river was formed about 500,000~130,000 years ago by a Volcanic explosion. The lava which flowed from the explosion created various geographies such as Basalt cliffs, columnar joints and waterfalls, and eventually developed the beautiful landscape of present Hantan-river.