The Ganghwa Nadeul-gil Trails are a collection of walking paths along the coast of Ganghwa Island that connect the watchtowers and and walls of Ganghwasanseong Fortress, as well as royal tombs and other historically significant sites from the Goryeo dynasty that dot the island. [Ganghwa Nadeul-gil Course 2] Homeland Fortification Trail Course 2 stretches over a 17 kilometer area between Gapgotdon Watchtower and Choji