List of World’s Largest Cave Rooms
Rank Name Country Size (Sq M) Volume (Sq M) Source of Map, Survey, and Information
1 Sarawak Chamber (Lubang Nasib Bagus) Malaysia 163,000 (LiDAR) 9.6 Million (LiDAR) Descent v.226, p.29. 2012, Surveying Sarawak Chamber, Kevin Dixon. (LiDAR Survey)
Mulu Caves Project. http://www.mulucaves.org
Meredith, M., Wooldridge, J. and Lyon, B., 1992. Giant Caves of Borneo. Tropical Press, 142 pp.
2 Miaos Room  China 118,000 7.1 Million (est) Barbary, Jean-Pierre, et al, 1991, Le System de la Riviere Gebihe (Ziyun, Guizhou), in:Karstologia Nº. 4. pp42-55.
Gebihe 89, Karsts de Chine, Grottes et karsts tropicaux de Chine Méridionale, Fédération Française de Spéléologie et Association Française de Karstologie
3 Torca del Carlista Spain 87,000   Abismo, G.E. (Editor), Torca del Carlista (Cantabria-Vizcaya).
http://clubabismo.es/Simas/Carlista/InfoTorcaCarlista.html
4 Ghar -e- Dosar Iran 81,500   http://iransplo.com/newsDetail.aspx?mode=1&id=432
5 Majlis al Jinn Oman 58,000   ATM-3D (Editor), 2011. Majlis al Jinn Cave 3D laser scanning, 2011. 
http://www.youtube.com/user/atm3d#p/u/8/QgDHTDQp8Q0
Davison, D.W., Jr., 1985. Majlis Al Jinn Cave, Sultonate of Oman.  Public Authority for Water Resources, October 1985(PAWR 85-20): 1-16.
6 Titan Chamber China 54,000   Martin Laverty and Ian Houghton, personal correspondence.
Smart, C. 1988. Caves and Caving, 42, 5-9.
Dunton, Bruce; Laverty, Martin. 1993. Cave Science Vol.20, No.2, 65-71.
7 Cloud Ladder Hall China 51,000 5.8 Million (est) Hong Meigui Cave Exploration Society. 2010. Map 2011.
8 Belize Chamber Belize 49,000   Chiquibul Expedition 1984, Tom Miller
Canadian Caver, v.16, no.2, Fall 1984, p.43
9 Hong Meigui Chamber China 48,000   Hong Meigui Cave Exploration Society.
 Map: Dacao Tiankeng, 2001
9 Tlamanictli Mexico 46,000   G.S.A.B. (Editor), 1999a. Tlamanictli - TZ1. Groupe Spéléo Alpin Belge. 
http://home.scarlet.be/continent7/gsab/mexplos/tz1coupe.htm
G.S.A.B., 1999b. Tlamanictli - TZ1. In: G.S.A. Belge (Editor). Groupe Spéléo Alpin Belge, pp. Plan view map of Tlamanictli - TZ1.
Grebeude, Richard. Personal Communication.
  Other Large Rooms        
x Salle de la Verna France 43,000 (LiDAR) 3.6 Million (LiDAR) ATM-3D (Editor), 2004. Le scannage de la Salle de la Verna, 
   Réseau de la Pierre St Martin, 2010. 
   http://www.atm3d.com/v5/pdf/verna.pdf
ATM-3D (Editor), 2006. Le levé lasergrammétrique modélisation 
   3D - implantation de projet, 2010. 
   http://www.atm3d.com/v5/pdf/vernaII.pdf
x Api Malaysia 39,000   Map of Whiterock Cave, Api, Mulu.  Mulu Caves Project, 
http://www.mulucaves.org
Compilation by Mike Futrell and Ben Schwartz