Discovered in 1980 within Gunung Mulu National Park, the Sarawak Chamber measures roughly 700 meters long and 300 meters wide, giving it a surface area of about 154,530 square meters, large enough to fit eight jumbo jets side by side. It holds the Guinness World Record for the largest known single cave chamber by surface area.
Record no. MRB-2026-005835
World's Largest Single Cave Chamber by Area
Reference Record – Not Certified
This record is compiled from publicly available sources for reference. It has not been examined or certified by The Book of World Records.