Ondal Tourist Area is the site of a battle between Goguryeo and Silla in the 6th Century over the control of the Hangang River. It is home to Ondal Exhibition Hall, the Ondal Open Film Set, Ondalsanseong Fortress, and Ondaldonggul Cave, inspired by the story of Goguryeo general Ondal and Princess Pyeonggang. Many Korean historical shows have been filmed in the Ondal Open Film Set. Ondaldonggul Cave was formed by the dissolution of limestone created during the Paleozoic period.