Seonghwangnim (Tutelary Forest) means a forest where a local god who protects the town lives. The shrine woods in Seongnam-ri, Wonseong, is a little far from town. Villagers in Seongnam-ri have believed the local god of Chiaksan Mountain to be their guardian. Seonghwangnim consists of many trees such as Carstor Aralia and Rubus coreanus. The people in the village performed a sacrificial ritual for the god wishing for the well-being and peace of the town twice a year on April 8 and September 9. The Tutelary Forest of Seongnam-ri, Wonseong, has representative deciduous trees of temperate regions as well as biological value. Therefore, it is designated and protected as a natural monument.