Deep inside Pha Wiang Cave in Na Wang district in Thailand’s northeastern province of Nong Bua Lam Phu, archaeologists have uncovered a set of prehistoric rock paintings never before documented — images left on stone somewhere between 1,500 and 3,500 years ago.

A team of five archaeologists from the Fine Arts Department's Regional Office 8 in Khon Kaen Province surveyed Tham Thammasan, one of the caves at Pha Wiang, and found several strikingly clear panels of animals and human activity. The standout scene: a wild bovine alongside four monkeys climbing vines. The team also identified two sets of handprints, and paintings from a later period layered directly over earlier ones.

“The paintings may reflect the environment and daily life of prehistoric communities here: wildlife, hunting, possibly ritual," said Thippawan Wongadsapaiboon, an archaeologist with the Fine Arts Department. The cave walls, she suggested, may have doubled as a classroom of sorts, passing hunting knowledge from one generation to the next.

The site gave up more than paintings. Pottery fragments with incised patterns closely resemble artefacts from Ban Chiang in neighbouring Udon Thani — hinting at cultural ties stretching across the upper Northeast. Researchers now believe Pha Wiang may sit along a broader prehistoric corridor running from Loei, through Phu Phrabat in Udon Thani, and onward to Nong Bua Lam Phu.

Further study is needed to pin down the exact age and significance of what's been found. But even now, Pha Wiang offers something valuable: fresh evidence of how prehistoric communities moved, traded, and shared traditions across this landscape thousands of years ago.