It's hard to tell one rocky plateau from another. Plus, the dark cave entrance that eventually leads to the treasure is ...

But finally I hoisted myself up a 450-foot rope to the cave’s main entrance (dubbed Izhevskaya, or R21). I began to see why cavers think of Dark Star as a living, breathing entity. Down at base ...

When something goes wrong, if they don't solve the problem and make it back to the cave entrance before their ... of the inland blue holes—deep, dark, sheltered, with little tidal flow ...

Deep inside a labyrinthine cave in southwestern France, ancient humans who lived around 30,000 years ago carved horses, ...

Ban Tham Cave in Son La is the only mountain tunnel road in Northwest Vietnam, offering a thrilling off-road experience through a dark, rocky passage. A must-visit for adventure seekers!