Orijangnim Forest is approximately 2 kilometers long, the same length as the Korean measurement of five ri (O-ri). It is also called Jacheon Forest due to its location near Jacheon-ri. The forest was split into two parts after a national roadway was built through the forest. Later, much of the forest was lost due to additional building construction, road expansion, and typhoon. Only some areas in front of Jacheon Village retain the old ambience.