Ku Praphachai (Ku Ban Na Kham Noi)

Ku Praphachai, also known as Ku Ban Na Kham Noi, is a Khmer-era arogayasala — a healing-temple hospital — commissioned by King Jayavarman VII (r. 1182-1219) in Nam Phong district, Khon Kaen. Entry is free, roughly 06:00 to 18:00 daily, and it sits about 7.5 km from Phrathat Kham Kaen and 12 km from King Cobra Village.

Built from laterite within a 25 x 35 metre outer wall, the complex includes a prang (tower), a bannalai (library), and an eastern gopura, or gatehouse. The prang itself is largely intact under its grass-topped roof, though part of the vestibule that once stood in front of it has collapsed. The gopura is in better shape — its walls, doorways, and three small side rooms remain fairly complete, giving a clearer sense of the original layout than most sites of this age manage. This was never meant to be a temple in the conventional sense: Jayavarman VII built 102 of these arogayasala across the empire specifically as places of healing, and Ku Praphachai is one of the more legible survivors.

Insider Tip: The small Ku Prapha Chai Local Learning Center on site displays pedestals, Bhaisajyaguru (Medicine Buddha) sculptures, and construction fragments recovered during excavation — worth the stop if you’re there on a weekend, since it’s only open Saturdays and Sundays, roughly 9am-3pm, and signage is Thai-only.

The site hasn’t been fully divorced from its original religious purpose. Water from the temple’s pond is still used during Songkran to bless Buddha images, monks, and elders over 60 — a tradition that ties directly back to the site’s original healing function and, historically, to royal coronation rites. Local families visit periodically to pay respects, so it’s worth treating the grounds with the same quiet respect as an active temple rather than a pure archaeological curiosity.

Watch out: Shade is limited around the ruins themselves, and outside weekend museum hours there’s no one on site to answer questions — bring water and expect a self-guided visit most days of the week.

Combine it with a broader loop around Khon Kaen, stopping at Phrathat Kham Kaen and King Cobra Village on the same day.