Chungcheongbuk-do(Danyang-gun)
Situated on the outskirts of a mountain behind Cheondong-ri (Danyang), Cheondong Cave is a limestone cave of 470m in length. Created 450 million years ago, the cave is known to have beautiful limestone rocks often called “flower trays.” The cave is decorated with a breathtaking array of stalactites, stalagmites, columns and soda straws as if they were part of a lush forest. Abundant animal deposits render the cave a huge specimen gallery.Although it is a relatively small, separate cave, Cheondong boasts plethora of splendid natural features. Along with Gosu Cave (designated as Natural Monument No. 256) in Gosu-ri, Danyang, Cheondong Cave is considered one of the most beautiful limestone caves in Korea.