This story appears in the August 2010 issue of National Geographic magazine. We sink into Stargate ... Brian Kakuk—one of the world's foremost cave divers. He appears unfazed.

This story appears in the January 2011 issue of National Geographic magazine ... sitting alone in the blackness along the wall of the cave. “Carry on mate,” growls Sims.

This story appears in the June 2010 issue of National Geographic ... that cover nearly half a million square feet of wall space, some 40 times the expanse of the Sistine Chapel. The cave interiors ...

This story appears in the January 2013 issue of National Geographic ... a spare tent cover over a frame concocted of sledge runners and Mertz’s skis. Inside this gloomy cave, they laid their ...

This story appears in the June 2017 issue of National Geographic magazine. Veteran cavers Peter ... Back home, Peter marked the puka, or cave entrance, on a digital map and planned to return ...

At dusk, a swarm of bats disperses to hunt in the rainforest surrounding Deer Cave. One of the planet ... in the March 2019 issue of National Geographic magazine. Late on a sweltering morning ...

This story appears in the January 2015 issue of National Geographic magazine. This is where the cave lions are. And the woolly rhinos, mammoths, and bison, a menagerie of ancient creatures ...