The Largest Underground Chambers by Surface Area
	C A V E     N A M E	COUNTRY	AREA m2	SOURCE	DATE	DIMENSIONS (meters)
1	Sarawak (Chamber) - Lubang Nasib Bagus	Malaysia	162,700	Atlas - Great Caves of the World	1989	600 x 415 x 100
2	Miaos Room - Gebihe system	China	160,000	Fabien Darne - List	2001	700 x 215 x 70-100
3	Tlamanictli (TZ1)	Mexico	125,000	Richard Grebeude	2006	250 x 500
4	Xiniu (Rhino) Chamber	China	80,000	Wang Xun Yi, Cave Expeditions	1999	400 x 200
5	Torca del Carlista - La Grand Sala del GEV	Spain	76,620	Atlas - Great Caves of the World	1989	520 x 245
6	One big room ?	Laos	70,000	Fabien Darne - List	2001
7	Sistema TZ2-TZ7	Mexico	60,000	Richard Grebeude	2006	200 x 300
8	Majlis al Jinn - Majlis al Jinn	Oman	58,000	Atlas - Great Caves of the World	1989
9	Salle de la Verna	France	51,000	Fabien Darne - List	1989	255 x 245 x 180
10	Belize Chamber - Actun Tun Kul	Belize	50,050	Atlas - Great Caves of the World	1989
11	Weibu Chamber - Chijin Dong	China	46,200	Wang Xun Yi, Cave Expeditions	1999	400 x 108
12	Salle de l'Eclipse - Gouffe des Partages	France	45,000	Fabien Darne - List	2001	330 x 140 x 40
13	Entrance Chamber - Xiong Jia He Da Dong	China	43,200	Wang Xun Yi, Cave Expeditions	1999
14	Gruta de Villa Garcia	Mexico	40,820	Atlas - Great Caves of the World	1989
15	Salon de Gigantes - Gruta del Palmito (Bustamante)	Mexico	39,730	Fabien Darne - List	2001
16	Tham Toutche - Swallow Cave	Thailand	38,690	Fabien Darne - List	2001
17	Panayoran Chamber - langun Cave	Philippines	37,800	Speleologia No.17	1987	270 x 140 x 40
18	Kocain Big Room - Kocain Cave	Turkey	37,200	Atlas - Great Caves of the World	1989
19	Entrance Chamber - Ganduan Dong	China	37,000	Wang Xun Yi, Cave Expeditions	1999
20	Carlsbad Cavern Big Room	USA	33,210	Atlas - Great Caves of the World	1989
21	Grotta Gigante	Italy	33,120	Fabien Darne - List	2001	240 x 138 x 132
22	Sotano de las Golondrinas	Mexico	33,110	Atlas - Great Caves of the World	1989
23	Chiquibul (Chamber)  - Actun A	Belize	32,090	Atlas - Great Caves of the World	1989
24	Martel Dom ou Martel's Chamber - Skocjanske jame	Slovenia	32,090	Atlas - Great Caves of the World	1989	308 x 89 - 123 x 106
25	Tham Phuphaphet	Thailand	30,500	Axbridge Caving Group Journal	2001	1.03km loop
26	Xiji (Century) Chamber - West Cave, Leye	China	27,500	Wang Xun Yi, Cave Expeditions	1999
The Largest Underground Chambers by Volume
	C A V E     N A M E	COUNTRY	AREA Mm3	SOURCE	DATE
1	Luse	Papua New Guinea	50	Atlas - Great Caves of the World	1989
2	Ora	Papua New Guinea	29	Atlas - Great Caves of the World	1989
3	Minye	Papua New Guinea	26	Atlas - Great Caves of the World	1989
4	De Xiao Cho Koo	China	25	Atlas - Great Caves of the World	1989
5	sima mayor de Sarisarinama	Venezuela	18	Atlas - Great Caves of the World	1989
6	sotano del Barro	Mexico	15	Atlas - Great Caves of the World	1989
7	Kavakuna	Papua New Guinea	15	Atlas - Great Caves of the World	1989
8	Korikobi	Papua New Guinea	14.6	Atlas - Great Caves of the World	1989
2	Miaos Room - Gebihe system	China	13	Fabien Darne - List	2001	700 x 215 x 70-100
9	Sarawak	Malaysia	12	Atlas - Great Caves of the World	1989
5	Salle de la Verna	France	11	Fabien Darne - List	1989	255 x 245 x 180
10	sotano de las Golondrinas	Mexico	5	Atlas - Great Caves of the World	1989
11	Korikobi	Papua New Guinea	5	Atlas - Great Caves of the World	1989
12	Benua	Papua New Guinea	5	Atlas - Great Caves of the World	1989