Seri Thai Cave is about 4 kilometers from Paen-Saen Tong village, Wiang Ta Subdistrict, Long District, Phrae Province, along the Rural Road, Thung Khaeo - Ban Wang Luang, Nong Muang Khai District, Ban Paen - Ban Saen Thong, Wiang Ta Subdistrict, Long District, Phrae Province. this In the past, locals called it Tham Pha Bong. Nearby there is a creek flowing through. which the locals call it Huai Tham and most importantly, during World War II, the Seri Thai Unit organized it. It's a place to store weapons. Ammunition and food supplies for the soldiers.