<P> 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 (Good Luck Cave), which is located in Gunung Mulu National Park, in the Malaysian state of Sarawak on the island of Borneo . </P> <P> 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 . </P>

Largest underground chambers in the world at gunung mulu is