(Tham Urai Thong, Uraithong Cave) is a passage cave in the Satun UNESCO Global GeoPark, recently developed as a show cave. The cave is located in a 675 m long and 80 m wide, north-south oriented, elongated karst tower. The entrance is located in the middle of a 40 m wide and 25 m high rock face and originally required some climbing. During development, an elevated path with stainless steel lands was installed. Since the karst tower is only 50 m wide at this point, the cave is rather short. The cave is a single straight passageway with an ellisoid profile, 10 to 15 m wide and 4 m high.