Ice Cave Near The Mutnovsky Volcano, Russia

Waitomo Glowworms Cave, New Zealand

Son Doong Cave, Vietnam

Batu Caves, Malaysia

Marble Caves, Patagonia

Phraya Nakhon Cave, Thailand

Ellison’s Cave, Georgia, US

Vatnajokull Glacier Cave, Iceland

Cave in Algarve, Portugal

Reed Flute Cave, China