Caves may be sᴘooκʏ ᴀɴᴅ ᴇᴇʀιᴇ at first glance, but many of these underground chambers are full of wonderful surprises. Exploring various mysterious caves from across the globe will bring you face to face with thriving ecosystems, glowworms, underwater systems, and glimmering crystals. If you’re looking for an adventure of a lifetime, all you have to do is look underneath your feet and venture inside these 16 natural structures that’ll make your jaw drop.

Waitomo Caves – New Zealand

Mutnovsky Volcano Ice Caves – Russia

Eberstadt Stalactite Cave – Buchen, Germany

Meramec Caverns – Missouri

Ryūsendō Limestone Cave – Iwate Prefecture, Japan

Cave of the Crystals – Mexico

Ruby Falls – Tennessee

Reed Flute Cave – Guangxi, cнιɴᴀ

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