The philosophy of traveling deeper has many applications in the world of exploration. It can mean dining with locals, learning the history of a place before walking its streets, taking the bus instead of a taxi.
But it can also be literal. Traveling deeper amongst the cobblestone roads of a beautiful European city is incredible, yes, but what about traveling deeper into…the Earth? At these caves around the world, daylight is replaced by headlamps, and the sites were forged by nature’s hand.
Here, nine breathtaking caverns to add to your travel to-do list.
SEE ALSO: The 18 hottest honeymoon destinations right now
DON'T FORGET: Follow Business Insider's Lifestyle page on Facebook!
Mendenhall Ice Caves — Alaska
Relatively difficult to reach, the glowing-blue Mendenhall ice caves are situated underneath the 13-mile-long glacier of the same name. But this otherworldly sight won’t be around forever—although glacier melt originally formed these caves, rising global temperatures also mean that they will be the cause of its eventual disappearance.
Blue Grotto — Capri
This small sea cave on the island of Capri is one of the country’s most famous. Red particles are filtered out of the light that enters into this grotto, giving the water within a fantastical blue glow. Lie flat in a rowboat while an opera-singing local steers you through and experience the wonder for yourself.
Waitomo Caves — New Zealand
No, it’s not Disneyland’s newest space-themed ride. Waitomo caves in New Zealand get their signature starry-night glimmer from thousands upon thousands of luminescent, aptly named glowworms that call the place home
See the rest of the story at Business Insider