Mesmerizing Son Doong cave in Vietnam is believed to be the largest cave in the world (around 9 hours from Hanoi)
A group of cavers descends into Ellison's Cave far under Pigeon Mountain in northwest Georgia. The cave's "Fantastic Pit," seen here, is the deepest cave drop in the continental United States at a staggering 586 vertical feet.
Hang Son Doong La plus grande grotte du monde
Explore the ancient caves of Hang Son Doong, Vietnam. Hang Son Doong is one of the largest caves in the world and features a fast-flowing underground river. For spelunkers, exploring Hang Son Doong is the equivalent of scaling Mount Everest.
The Magnificent Son Doong Cave in Vietnam – The Biggest Cave in The World; looks like Hogwarts
Ice cave in the Skaftafell National Park in Iceland. Ice caves collapse and new ones form as each glacier grinds slowly towards the sea. Local guides can help you (without dying) find one. (Visit Skaftafell National Park in Iceland.