Largest Cave Systems (Volume)

The world's largest cave systems ranked by the internal volume of their chambers. These massive subterranean voids often contain entire ecosystems.

• Sarawak Chamber — 12,000,000 (Gunung Mulu National Park, Malaysia)
• Son Doong Cave — 5,000,000 (Phong Nha-Ke Bang, Vietnam)
• Miao Room — 3,000,000 (Ziyun County, China)
• Big Room (Carlsbad Caverns) — 1,200,000 (New Mexico, USA)
• Hao Meoumeou — 1,000,000 (China)
• Giant Chamber (Ogof Ffynnon Ddu) — 800,000 (Wales, UK)
• Great Cave of Niah — 750,000 (Sarawak, Malaysia)
• Sistema Sac Actun — 700,000 (Yucatán, Mexico)
• Spirit Cave — 600,000 (Thailand)
• Mammoth Cave — 550,000 (Kentucky, USA)

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