Clearwater cave is believed to be the largest interconnected cave system in the world by volume and the longest cave in the world. The cave lies on the western margins of Gunung (Mount) Api in Gunung Mulu National Park in Sarawak.
The giant caves of Gunung Mulu National Park - Going to Gunung Mulu Cave explorers progress downstream in Clearwater River Cave. The eighth longest cave in the world, it's found in Gunung Mulu National Park, Sarawak, Borneo, Malaysia.
Mulu Caves National Park is home to one of the longest networks of caves in the world. Here lies the worlds largest underground chamber, the Sarawak Chamber, capable of accommodating forty Boeing 747 airplanes.