Locates in Tambon Nam Rat of Nong Muang Khai district in Tham Cham Pu, some 17 kilometres from town and with a further distance of 8 kilometres after a left turn. Within the cave is a large hall-like chamber with smaller rooms connected by tunnels. It is beautiful adorned with glittering stalactites and stalagmites.
- Tham Pha Nang Khoi
- The Wiang Kosai National Park