Gamaksan Mountain gets its name from the slivers of bluish tinged rock (‘Gamak’ meaning ‘dark blue rock’) on the mountain. The mountain is one of five rocky mountains in the Gyeonggi Province, along with Hwaaksan, Songaksan, Gwanaksan, and Unaksan Mountains; Gamaksan Mountain is less known among the general public. Below Janggunbong Peak, visitors can find Imkkeokjeonggul Cave where Imkkeokjeong, the legendary Korean Robin Hood, hid from government troops. Near Seolmarigyegok Valley are monuments for Korean and English soldiers who lost their lives in the Korean War. The mountain used to be home to four temples but currently there is only Beomnyunsa Temple, rebuilt in 1970 at the site of the previous Ungyesa Temple.