Sarawak Chamber
Sarawak Chamber is the largest known cave chamber in the world by area and the second largest by volume after the Miao Room in China. It is in Gua Nasib Bagus, which is located in Gunung Mulu National Park in the Malaysian territory of Sarawak on the island of Borneo.
Discovery
The chamber was discovered by three British cavers, Andy Eavis, Dave Checkley and Tony White, in January 1981 during the Mulu'80 Expedition. The story of how it was discovered is told in the books Underground Worlds and Giant Caves of Borneo.Later named Sarawak Chamber, it measures long, wide and a maximum of high, and was estimated as three times the size of the Big Room in Carlsbad Caverns National Park, New Mexico, then thought to be the largest underground chamber. Its volume and area were checked by laser scanning in 2011 and were found to be and respectively.
To reach Sarawak Chamber, one must follow a river upstream from the cave entrance. This long passage has a roof up to high, and may require some swimming and a traversal along a ledge. Accompanied visits can be arranged by the national Park.