The Waitomo Glow Worm cave.
Mesmerizing Son Doong cave in Vietnam is believed to be the largest cave in the world (around 9 hours from Hanoi)
The eerie blue glow reflected in the water of the Waitomo Glowworm Caves in New Zealand is actually caused by tiny glowing insects on the ceiling.
Marble Caves, Chile Paddle through Lake General Carrera on the Chile-Argentina border and you'll stumble upon some otherworldly treasures. Millenniums of lapping waves carved calcium carbonate into the swirling caverns known as the Cuevas de Mármol.
this isn't happiness™ (Glow worms, Shaun Jeffers), Peteski
Bermuda Crystal Caves - The Stripe - Belize
Son Hang Doong, the World's Largest Cave, National Park Phong Nha Ke Bang, Vietnam. Photography by Ryan Deboodt, via
Stephen's Gap Cave by Brad Mitchell (Woodville, Alabama)
Benagil Caves, Algarve, Portugal (This is one of the places I'm considering moving to!