Geumjeong Mt. Fortress (Geumjeongsanseong) Tours and Tickets

Perched atop the peak of Busan’s Mount Geumjeong, Geumjeongsanseong—the largest mountain fortress in South Korea—is now an imposing ruin and popular hiking spot. It has a long history: The original fort is believed to have been built during the Three Kingdoms Period from 57 BC to 668 AD The 2.5-mile-long structure that remains standing today was built in 1703 as protection against Japanese invasions following the Imjin War at the end of the 16th century.