Tham Sao Hin Cave

Tham Sao Hin Cave is a large limestone cave located inside Lam Khlong Ngu National Park in Thong Pha Phum District, Kanchanaburi Province, western Thailand. It is notable for housing a 62.5-meter-tall stalagmite column, considered the tallest in Thailand and among the tallest in the world. The cave is accessible only by guided trek and bamboo rafting during the dry season and requires advance permission from the national park.

Visitors can expect a remote jungle cave experience inside Lam Khlong Ngu National Park. Access requires a guided trek through forest and wading or bamboo rafting along Lam Khlong Ngu River to reach the cave entrance. Inside, a vast chamber contains the massive 62.5-meter column formed by joined stalactite and stalagmite, along with other stalactites, stalagmites and limestone formations. The site is undeveloped with no lighting or walkways, and exploration is with park guides using headlamps.

Tham Sao Hin is a significant geological site formed over millions of years by limestone dissolution. The 62.5-meter column was surveyed and recognized as Thailand's tallest cave column. The cave lies within Lam Khlong Ngu National Park, established in 2000 to protect the forest and cave systems of the Tenasserim Hills.

The cave is a protected natural heritage site valued for its geological importance and as a major nature tourism attraction of Kanchanaburi Province. It is managed by the Department of National Parks, Wildlife and Plant Conservation with controlled access to preserve its natural state.