Donggosanseong is a mountain fortress near Girinbong in Jeonju. It was built to prepare for emergencies in Jeonju, the capital of Later Baekje under Gyeon Hwon, and today people visit it as a short hiking course. The trail is not steep, is shaded, and looks down over the Jeonju city area. It has not been restored, so only the old fortress site remains.