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 ...

This time, we're diving even deeper into the massive underground river cave that lies beyond the mysterious pipe entrance. With new challenges ahead, we navigate the dark and winding passages ...

The cave is actually harder to find than I first expected — there’s a huge dead bush in front of it that obscures the entrance after ... It’s damp and dark inside, and the ceiling forces ...

These dark spaces are sheltered from the weather and provide ... which is thought to have been partly dug out by some very persistent elephants. The cave extends around 160 metres from the entrance ...