21 Gorgeous Caves That Prove Earth’s Greatest Wonders Are Underground
From azure caverns to crystal-bedded subterranean lakes, these places hold a visual bounty for explorers of all stripes, be they those who actually make the descent or those who prefer the safety of photographs. Here, in photos, are 21 of the world’s most incredible caves.
The Best of the Bizarre, the Puzzling, and the One-of-a-Kind
From weird history to strange culture to the downright inexplicable, this is the world your schoolteachers didn’t want to show you — and probably didn’t even know existed. See more at All That Is Interesting Curiosities.