Another interesting cave is Tham Pha Nang Khoi which is about 40 kilometres north of town on Highway No. 101 at Km. 59 within Rong Kwang district. A 50 metre-long rail leads to the cave mouth. Along the winding tunnels are strangely-shaped stalactites and stalagmites.

    At the end of the cave is a stalagmite shaped like a woman holding a small child. In front of the Nang Koi (waiting woman) stone is a heart-shaped stalactite. They are the source of the legend of the love of a woman who waited for her lover until she turned into stone.