Top Ten Longest Caves IN THE WORLD

The top cave on this list is over 400 miles long. That's a very long time to be underground!

1. Mammoth Cave, US, 426 miles

2. Sistema Ox Bel Ha, Mexico, 270.8 miles

3. Shuanghedong Cave Network, China, 249 miles

4. Sistema Sac Actun/Sistema Dos Ojos, Mexico, 239.9 miles

5. Jewel Cave, US, 217.3 miles

6. Optymistychna Cave, Ukraine, 164.4 miles

7. Wind Cave, US, 161.7 miles

8. Clearwater Cave System, Malaysia, 159 miles

9. Lechuguilla Cave, US, 150.4 miles

10. Fisher Ridge Cave System, US, 131.8 miles

Source: WorldAtlas.com
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