Longest Cave Systems — Natural Wonders — GK Maps

The world's longest cave systems. Measured in km. source: Wikidata. Explore the full ranking and compare countries on GK Maps.

• Mammoth Cave — 643.7 (United States)
• Sistema Sac Actun — 386.1 (Mexico)
• Optymistychna Cave — 264.6 (Ukraine)
• Clearwater Cave — 109.0 (Malaysia)
• Zolushka/Emil Racoviță cave — 91.0 (Moldova)
• Agen Allwedd — 32.5 (United Kingdom)
• Ogof y Darren Cilau — 29.8 (United Kingdom)
• Grotta del lago di Como — 25.6 (Italy)
• Baradla cave — 25.5 (Slovakia)
• Santo Tomás Cave — 25.0 (Cuba)
• Jaskinia Wielka Śnieżna — 23.8 (Poland)
• Riesending cave — 19.5 (Germany)
• Jaskyna mrtvych netopierov — 19.3 (Slovakia)
• Duhlata — 18.2 (Bulgaria)
• Dan yr Ogof — 17.0 (United Kingdom)
• Lazar's Cave — 16.0 (Serbia)
• Dan-yr-Ogof — 16.0 (United Kingdom)
• Diros cave — 15.4 (Greece)
• Marie-Jeanne cave — 15.0 (Haiti)
• Tham Phra Wang Daeng — 13.8 (Thailand)
• Orlova Chuka — 13.4 (Bulgaria)
• Tham Mae Lana — 12.7 (Thailand)
• Hölloch — 11.3 (Germany)
• Sternes — 10.7 (Greece)

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