One of the world's deepest and most dangerous caves lies in Abkhazia, a disputed part of Georgia. It takes days to get to the ...

Two decades later, I organized a series of expeditions to investigate new deep caves, using dye traces in cave streams to probe Arabika’s potential depth. In 2001 a team led by Ukrainian Yuri ...

Sunlight penetrates deep inside, allowing mosses ... shafts—tunnels that slope relatively straightforwardly down—natural caves are nonlinear and ex-pand and contract according to the movement ...

We set out to explore what might be the biggest river cave we’ve ever seen, and this adventure quickly turned into one of the craziest expeditions we’ve filmed. With permission to park near the cave ...

Scientists have found ancient nail tooth shark fossils deep inside Mammoth Cave in Kentucky, revealing new information about ...

And we’re blessed to have so many awe-inspiring natural wonders around the world to explore. Amid the millions of miles and ...

But these deep, dark habitats are often challenging for humans to access. Underwater caves can be dangerous for even the most experienced divers. There is usually no natural light, spaces can be ...

Residents and visitors undoubtedly know about the natural attractions ... and been to the deepest parts of the its oceans, but they never know what they might find in a cave, or if they might ...