🔄 Updated 21 Jun 2026
Nong Bua Lamphu isn't the first province that comes to mind when you plan an Isan trip, but if you're into traces of prehistoric people, there's the real thing to see here. Phu Pha Ya is a limestone hill that breaks off from the Phu Phan range, sitting inside Phu Kao–Phu Phan Kham National Park on the Suwannakhuha side. On the cave wall are red paintings that archaeologists estimate at around 3,000–4,000 years old, from a community of roughly the same era as Ban Chiang.
Where is Phu Pha Ya
Phu Pha Ya lies north of Ban Na Charoen, Na Si subdistrict, Suwannakhuha district, Nong Bua Lamphu province. It's a limestone hill split off from the Phu Phan range. The paintings sit on the walls of two cave levels — a lower cave and an upper cave — all under the care of the Fine Arts Department together with Phu Kao–Phu Phan Kham National Park. This area is the same neighbourhood as Wat Tham Suwannakhuha, which also has red paintings at its cave mouth.
- District: Suwannakhuha, Na Si subdistrict (north of Ban Na Charoen)
- Located in: Phu Kao–Phu Phan Kham National Park, Phu Kao side
- Terrain: Limestone hill split off from the Phu Phan range, with two shallow cave levels
- Age of paintings: About 3,000–4,000 years (prehistoric era)
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What the paintings show
The paintings at Phu Pha Ya are all in red, scattered in clusters along the cave walls. Roughly speaking, they split into two zones by cave level, and each zone tells a different kind of story. If you take your time, you'll spot details that make you wonder what people thousands of years ago set out to draw.
- Lower cave — a smooth wall about 5 metres long, with geometric patterns, animal figures and red handprints, which work like the signatures of people from that era
- Upper cave — paintings scattered in clusters, with clear diamond shapes, human figures, reptiles and the outlines of large animals
- Colour tone — red made from mineral pigment in the soil, holding fast on the limestone for thousands of years, though some spots have faded with time
See the paintings better
The paintings are faint and blend into the rock colour from some angles. If you go in the slanting light of early morning or late afternoon, the lines show up more clearly than at midday when the sun is overhead. Bring a small flashlight too — it helps light up the corners that sit in shadow.
The wide field view below
Another reason Phu Pha Ya is worth the climb is the view. The hill stands alone in the middle of a plain, so once you reach the caves and the rock ledges, you look down on rice fields and villages spreading wide below. The scene changes with the seasons — deep green in the rains, golden at harvest time. Prehistoric people probably chose this spot to live and paint because you can see far in every direction.
How to get to Phu Pha Ya
Phu Pha Ya is in Suwannakhuha district, a fair distance from Nong Bua Lamphu town. The main route is to drive your own car up to the north of the province, then turn in via Ban Na Charoen, Na Si subdistrict. The last stretch is the village access road and the climb up the hill. It's best to contact a local or a park ranger to guide you, because signage is sparse and the site isn't right off a main road.
- Private car — the most convenient. From town, head toward Suwannakhuha district, then ask for the way into Ban Na Charoen / Phu Pha Ya
- Check with the park — Phu Kao–Phu Phan Kham National Park (tel. 063 648 4821) can confirm the route and the state of the climb before you go
- Find a guide — the site sits fairly deep in; locals from Ban Na Charoen know the way up to the caves best
- Public transport — limited and doesn't reach the site. With no car, it's best to charter a ride from town or Suwannakhuha district
Straight talk before you go
Phu Pha Ya is a small archaeological site that hasn't been developed into a full tourist attraction. There are no shops, no reliably working toilets, and parts of the climb are dirt and rock. If you're expecting full facilities, this may not be the place. But if you like a raw atmosphere and the stories of ancient people, here you get it in full.
More to see around Suwannakhuha
Because Phu Pha Ya is fairly far out, it's worth pairing the trip with other sights in the same area. Suwannakhuha district and the Phu Kao zone have spots that connect both through nature and through the traces of ancient people.
Wat Tham Suwannakhuha
An old limestone cave temple from the Lan Xang era, with Buddha images and red paintings at the cave mouth. Also in Na Si subdistrict — you can drive on from Phu Pha Ya.
Phu Kao–Phu Phan Kham National Park
Forest and lake views above the Ubolratana Dam, with viewpoints and several more prehistoric sites in the same zone.
Ubolratana Dam Reservoir (Phu Phan Kham side)
Wide lake views in the evening — good for closing out the trip before heading back to town.
Best time to go
- Late rains to early cool season (Oct–Feb) — the weather is just right, the fields below run from fresh green to gold, and the climb is easiest
- Avoid the heavy rains — the dirt-and-rock climb can get slippery, and rain blocks the view
- Hot season — doable, but go in the morning or late afternoon to dodge the harsh midday sun
Plan a full day in Nong Bua Lamphu, taking in nature spots and traces of ancient people.
See the Nong Bua Lamphu travel guide →