Khu Praphachai, commonly referred to by locals as "Ku Ban Na Kham Noi," is a significant historical site located within the grounds of Wat Khu Praphachai in Buai Yai Sub-district, Nam Phong District, Khon Kaen. This ancient Khmer sanctuary dates back to the 18th-century Buddhist Era, coinciding with the reign of King Jayavarman VII, the last great monarch of the Khmer Empire. The site functioned as an "Arokayasala," or a hospital chapel, one of the 102 medical facilities established by the king along major ancient routes to provide spiritual and physical healing to his subjects and travelers, reflecting the profound compassion of Mahayana Buddhism.

The architectural complex is primarily constructed from laterite and sandstone. Its layout features a central Prang (main tower) with a square base and indented corners, oriented towards the east to greet the morning sun. To the southeast of the main tower stands the "Bannalai," or library, a smaller structure traditionally used for storing sacred religious scriptures. The entire inner sanctuary is enclosed by a rectangular laterite wall with a single monumental gateway, known as a "Gopura," located on the eastern side. Outside the enclosure lies a "Baray" (sacred pond), lined with laterite steps, which has served as a source of holy water for ritual ceremonies for centuries.

What distinguishes Khu Praphachai from other hospital chapels in the region is its remarkable state of preservation and its status as a "living" sacred site. It houses "Luang Pho Ku," a highly revered ancient sandstone Buddha image that remains a spiritual anchor for the people of Khon Kaen. Local folklore suggests that the site possesses healing powers, leading many to visit in search of recovery from ailments and for overall protection. The site comes alive annually during the full moon of the 5th lunar month for the "Song Nam Ku" festival, a major celebration featuring traditional performances and merit-making ceremonies. This enduring devotion highlights the seamless integration of an 800-year-old archaeological wonder into the contemporary cultural fabric of Northeast Thailand.

• From Khon Kaen city, take Highway 2 (Mittraphap Road) towards Udon Thani. Upon reaching Nam Phong District, turn right onto Highway 2039. Drive straight, following the signs to Bua Yai Subdistrict. The distance from the city is approximately 50 kilometers.

• It is best to visit in the morning to catch the beautiful light illuminating the stone castle.

• As it is a sacred site highly revered by the locals, please dress respectfully and maintain a quiet atmosphere while visiting.

• Wear appropriate walking shoes and respect the historical site; do not climb on or damage the ruins.

Admission Fees:

• Free of charge. There is no admission fee to enter the site. However, donations for the maintenance of the sanctuary and the temple are welcome.

Opening Hours:

• Open daily from 07:00 AM to 05:00 PM.