۲٫ Ice Cave Near The Mutnovsky Volcano, Russia

3. Naica Mine, Mexico

4. Vatnajokull Glacier Cave, Iceland

5. Batu Caves, Malaysia

6. Mendenhall Glacier Cave, USA

7. Cave in Algarve, Portugal

8. Glowworms Cave, New Zealand

9. Tham Lod Cave, Thailand

10. Kyaut Sae Cave, Myanmar

11. Marble Caves, Patagonia

12. Antelope Canyon, USA

13. Phraya Nakhon Cave, Thailand

14. Ellison’s Cave, USA

15. Reed Flute Cave, China