Sarawak Chamber

I am watching Planet Earth on BBC 1 at the moment which about Sarawak Chamber or Deer Cave, the biggest cave chamber in the world which is 5 times bigger than St Peter's Cathedral in Rome and it could hold 38 football fields or 10 jumbo jets nose-to-tail in it. It was discovered by 3 Englishmen on January 1981 who are exploring Sarawak (Malaysian side of Borneo) at that time.