World's Most Rare Caves For Adventure Travel

The world is full of fascinating and unique caves that beckon the adventurous traveler.

Hang Sơn Đoòng, Vietnam

This behemoth is the world's largest cave, boasting chambers so vast they could fit entire city blocks.

Naica Crystal Cave, Mexico

Imagine a cavern filled with giant, translucent crystals, some as long as 30 feet.

Waitomo Glowworm Caves, New Zealand

Take a boat ride through a network of caves illuminated by thousands of tiny glowworms, creating an ethereal, starry night sky underground.

Marble Caves, Chile

Kayak through turquoise waters amidst towering marble cliffs and cathedral-like caverns in this Patagonian wonderland.

Thor's Well, Oregon

This mysterious sinkhole appears like a bottomless pit, especially when the ocean surges and sprays mist high into the air.