The Pha Nang Khoi Cave is located about 40km north of Phray city on Highway No. 101 within Rong Kwang district. There is a 50m-long rail that leads you 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 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.