"Naka Cave" is a cave located in the area, Phu Langka National Park Bueng Khong Long District, Bueng Kan, the boundary between Bueng Kan and Nakhon Phanom. The highlight of Naka Cave is that inside the cave you will find a rock shaped like a giant snake or the body of a serpent. It looks like the scales of a large snake. In term of geology, it was formed by rocks on the Earth's surface through alternating hot-cold temperature changes, physical processes undergo decay. The cracks on the surface surrounding the rock are called sun cracks. According to folklore or local beliefs, some people believe that the Naga that the villagers called Pu Aue Lue was cursed to become a stone trapped in this cave.