The Largest Underground Chambers by Surface Area (Floor) (by Volume page down)
	C A V E     N A M E	COUNTRY	AREA m2	SOURCE	DATE	DIMENSIONS (meters)
1	Sarawak (Chamber) - Lubang Nasib Bagus	Malaysia	154,530	Descent (245) P37	Aug-15	429 x 641 x 113
2	Miaos Room - Gebihe system	China	140,540	Descent (245) P37	Aug-15	336 x 824 x 177
3	Torca del Carlista - La Grand Sala del GEV	Spain	87,090	Descent (245) P37	Aug-15	287 x 497 x 97
4	Ghar -e- Dosar	Iran	81,500	http://iransplo.com/newsDetail.aspx?mode=1&id=432	Jul-05	365 x 265
5	Xiniu (Rhino) Chamber - Salle Xiniu	China	80,000	Wang Xun Yi, Cave Expeditions	Jun-05	400 x 200
6	Gua payem	Malaysia	70,580	Fabien Darne - List	Jun-05
7	Benua Chamber - Benua Sinkhole & Cave	Papua New Guinea	70,500	Atlas - Great Caves of the World	Jun-05
8	One big room ?	Laos	70,000	Fabien Darne - List	Jun-05
9	Majlis al Jinn - Majlis al Jinn	Oman	61,000	Descent (245) P37	Aug-15
10	Sistema TZ2-TZ7 - Grand Salle	Mexico	60,000	Richard Grebeude	Jun-05	200 x 300
11	Sistemul Humpleu - Sala Gigantilor	Romania	59,607	http://sghbern.ch/romania/	Jun-05	537x111x35
12	Cloud Ladder Hall - Hong Meigui Cave	China	57,460	Descent (245) P37	Aug-15	353 x 393 x 282
13	Hong Meigui Chamber - Hong Meigui Cave	China	54,870	Descent (245) P37	Aug-15	269 x 468 x 197
14	Tit(an) Chamber	China	54,750	Descent (245) P37	Aug-15	341 x 367 x 80
15	Belize Chamber - Actun Tun Kul	Belize	49,000	Descent (245) P37	Aug-15
16	Salle Tuke - Reseau Minye - Tevi Oro	Papua New Guinea	48,000	http://fabien.darne.free.fr/speleo/grandes_salles/	Jun-05	240x200x130
17	Tlamanictli (TZ1) - Salle La Muneca Fea	Mexico	46,377	Descent (245) P37	Aug-15	250 x 500
18	Weibu Chamber - Chijin Dong	China	46,200	Wang Xun Yi, Cave Expeditions	Jun-05	400 x 108
19	Salle de l'Eclipse - Gouffe des Partages	France	43,470	Descent (245) P37	Aug-15	245 x 243 x 199
20	Entrance Chamber - Xiong Jia He Da Dong	China	43,200	Wang Xun Yi, Cave Expeditions	Jun-05
21	Panayoran Chamber - Langun Cave	Philippines	43,200	Speleologia No.17	Jun-05	270 x 140 x 40
22	Gouffre de la Martin - Salle de la Verna	France	43,000	http://www.atm3d.com/v5/pdf/verna.pdf	Jun-05	255 x 245 x 180
23	Gruta de Villa Garcia	Mexico	40,820	Atlas - Great Caves of the World	Jun-05
24	Salon de Gigantes - Gruta del Palmito (Bustamante)	Mexico	39,730	Fabien Darne - List	Jun-05
25	Tham Toutche - Swallow Cave	Thailand	38,690	Fabien Darne - List	Jun-05
26	Deer Cave	Malaysia	38,600	Roo Walters	Oct-14	870 x 177 x 270
27	Api Chamber  (Whiterock Cave)	Malaysia	38,000	Descent (245) P37	Aug-15	300x200x100
28	Gua Kepayang (Sungai Baai)	Indonesia	37,800	http://fabien.darne.free.fr/speleo/grandes_salles/	#####	270x140
29	Kocain Big Room - Kocain Cave	Turkey	37,200	Atlas - Great Caves of the World	Jun-05
30	Entrance Chamber - Ganduan Dong	China	37,000	Wang Xun Yi, Cave Expeditions	Jun-05
31	Carlsbad Cavern Big Room	USA	33,210	Atlas - Great Caves of the World	Jun-05
32	Grotta Gigante	Italy	33,120	Fabien Darne - List	Jun-05	240 x 138 x 132
33	Sotano de las Golondrinas (open to surface)	Mexico	33,110	Atlas - Great Caves of the World	Jun-05
34	Chiquibul (Chamber)  - Actun Kabal	Belize	32,090	Atlas - Great Caves of the World	Jun-05
35	Martel Dom ou Martel's Chamber - Skocjanske jame	Slovenia	32,090	Atlas - Great Caves of the World	Jun-05	308 x 89 - 123 x 106
36	Sala Gabor Halasi (Sistemul Humpleu)	Romania	31,930	http://fabien.darne.free.fr/speleo/grandes_salles/	Jun-05	310x103x35
37	Tham Phuphaphet  - Swallow Cave	Thailand	30,500	Axbridge Caving Group Journal	Jun-05	1.03km loop
38	Xiji (Century) Chamber - West Cave, Leye	China	27,500	Wang Xun Yi, Cave Expeditions	Jun-05
The Largest Underground Chambers by Volume
	C A V E     N A M E	COUNTRY	AREA Mm3	SOURCE	DATE	L x W x H
1	Miaos Room - Gebihe system	China	10.570	Descent (245) P37	Aug-15	824 x 336 x 177
2	Sarawak	Malaysia	9.670	Descent (245) P37	Aug-15	641 x 429 x 113
3	Deer Cave	Malaysia	6.310	Roo Walters	Oct-14	870 x 177 x 270
4	Cloud Ladder Hall	China	6.210	Descent (245) P37	Aug-15	393 x 353 x 282
5	Hong Meigui Chamber - Hong Meigui Cave	China	5.250	Descent (245) P37	Aug-15	468 x 269 x 197
6	HMG	China	5.250	Roo Walters	Oct-14	474 x 226 x 212
7	Luse	Papua New Guinea	5.000	Atlas - Great Caves of the World	Jun-05
8	Ghar -e- Dosar	Iran	5.000	Descent (245) P37	Aug-15	365 x 265 x
9	sotano de las Golondrinas (open to surface)	Mexico	5.000	Atlas - Great Caves of the World	Jun-05
10	Korikobi	Papua New Guinea	5.000	Atlas - Great Caves of the World	Jun-05
11	Benua	Papua New Guinea	5.000	Atlas - Great Caves of the World	Jun-05
12	Majlis al Jinn - Majlis al Jinn	Oman	4.090	Descent (245) P37	Aug-15
13	Salle de la Verna	France	3.650	Descent (245) P37	Aug-15	243 x 245 x 199
14	Ora     (Doline)	Papua New Guinea	2.900	Atlas - Great Caves of the World	Jun-05
15	Minye     (Doline)	Papua New Guinea	2.600	Atlas - Great Caves of the World	Jun-05
16	Titan	China	2.530	Descent (245) P37	Aug-15	367 x 341 x 80
17	Torca del Carlista - La Grand Sala del GEV	Spain	2.140	Descent (245) P37	Aug-15	497 x 287 x 97
18	sima mayor de Sarisarinama     (Doline?)	Venezuela	1.800	Atlas - Great Caves of the World	Jun-05
19	sotano del Barro (open to serface)	Mexico	1.500	Atlas - Great Caves of the World	Jun-05
20	Kavakuna	Papua New Guinea	1.500	Atlas - Great Caves of the World	Jun-05
The Largest Passage (Trunk/Borehole)
	C A V E     N A M E	COUNTRY	Size (Meters)	SOURCE	DATE
1	Han Son Doong	Vietnam	5000x145x200	http://is.gd/uiin	Apr-09	145,000 Mm3
2	Deer Cave	Malaysia	4100x90x100	http://www.mulucaves.org	Jul-05	36,9000 Mm3