While out on a routine patrol in Thailand's Phu Khat Wildlife Sanctuary, rangers recently happened upon a mysterious mountain cave known as Ta Kueng that's covered with ancient rock art that predates the region's recorded history.

A routine forest patrol in northern Thailand just yielded an unexpected archaeological discovery.

Between August 14 and 16, rangers from Phu Khat Wildlife Sanctuary, while conducting anti-poaching expeditions in the Khwae Noi River basin, stumbled upon a previously unknown sandstone cave that includes ancient rock art. Preliminary observations suggest that human activity at the site may date back some 2,000 years, which could reshape experts’ understanding of prehistoric settlement in the region.

The site was given the name Tham Ta Kueng, or Ta Kueng Cave, and

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