Khao Chang Hai cave, Natural cave system in Na Muen Si, Thailand
Khao Chang Hai is a limestone cave system in Na Muen Si consisting of six main chambers connected by passages. These halls vary in size, with some ceilings reaching heights of about 150 meters and the entire system extending roughly 850 meters in length.
Archaeological evidence suggests that ancient human communities sheltered within this cave network during prehistoric times in Southeast Asia. Pottery fragments and stone tools found in the chambers date back to these early periods of habitation.
The name comes from a traditional story about a young elephant that mysteriously disappeared within these chambers during a religious journey. Local people continue to tell this tale, which shapes how the cave is understood today.
Access to the cave is provided through a concrete walkway with installed lighting, making exploration comfortable for all visitors. The marked pathways help you navigate the chambers, and the space is generally open during daytime hours.
The Pheka Hall contains limestone formations that resemble coral reef patterns, while Tham Sai Thong displays yellow-tinted mineral deposits. These contrasting geological features make each chamber visually distinct and easy to remember.
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