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 ...

The Graveyard Cave is readily visible from the ... and head east inside the forest to get to the adjacent entrance area that's blocked by a dark-colored stone slab that you can't lift without ...