Op Luang National Park

Op Luang is a national park in Chiang Mai Province shaped by the Mae Chaem River, which has carved deep passages through limestone formations over thousands of years. The landscape includes multiple valleys, cave systems, and viewpoints that reveal the river's ongoing work on the rock formations.

The park area hosted human settlements in prehistoric times, with evidence of rock paintings and tool use at specific locations. The landscape itself developed over millions of years through continuous water erosion of the limestone.

The park territory contains numerous ethnic communities who maintain traditional practices and connections to the natural environment through generations.

The park is accessible on foot with clearly marked trails in most areas and multiple starting points for different difficulty levels. It is best to arrive early and bring plenty of water, as hiking in the heat can be demanding.

The Tham Tu Pu cave system contains natural limestone formations with deposits of stalagmites and stalactites that accumulated over thousands of years. This underground structure creates a striking contrast to the open river valleys visible above ground.