Tham Le Khao Kop is a limestone cave with a subterranean stream in Trang province, which can be visited only by a thrilling boat ride in a flat-bottomed rowing boat, although parts of the cave that are above water level can be visited on foot once inside.

The circa 800 meter long stream flows through a high and steep mountain, which is part of the Banthat Mountain Range. Besides the stream, there is also has a circa 4 km subterranean labyrinth of halls and tunnels full of striking rock formations and speleothems.

There are a total of 8 rooms in the cave, though only 5 are open to the public. Once inside the boat will dock at multiple places to allow visitors to walk around. After the last visit on foot, the boat ride continues its journey through a section of the cave known as ‘Sifting the Dragon's Belly’.

Here, the ceiling is so low that visitors must lay flat on their backs in order to pass through, with the ceiling and its stalactites passing by overhead just millimeters from ones face and the boatmen must literally push their small vessel through the narrow passages...