Coober Pedy, Australia, is famous for its underground life. The desert heat led residents to build homes, churches, and ...

What began as a limestone mine boring into the cliffs above the Missouri River has become a sprawling underground complex — and home to one of Kansas City's most distinctive races. The big picture: ...

I tried not to think about the 1,300 metres of solid rock over my head ...

Can humans survive without the sun? Apparently, they can, in fact, they already did. The idea of living completely underground seems like a compelling Hollywood narrative, but for others, subterranean ...

On the eastern flank of the tiny constitutional monarchy of Lesotho, about 225 kilometers from Durban, South Africa, sits the village of Ha Mokoto. Its residents are eking out a living in a manner not ...

Down at the bottom of 380 dizzying steps, the walls are an imperfect gray. They look like rock — but they taste salty. How do visitors know? They’re encouraged to lick them. Just to the southeast of ...