Top 10 Greatest Natural Caves in the World 

10. Painted Cave, California

9. Fingal’s Cave, Scotland

8. Caverns of Sonora, Texas

7. Cave of Swallows, Mexico

6. Waitomo Glow-worm Caves, New Zealand

5. Antelope Canyon, American Southwest

4. Marble Caves, Chile-Argentina

3. Caves of Algarve, Portugal

2. Ice Cave near Mutnovsky Volcano, Russia

1. Son Doong Cave, Vietnam