A 100-year-old tragic cave accident led to this national park. Here's what happened.
Floyd Collins got trapped in a Kentucky cave 100 years ago this week, an incident that led to the creation of Mammoth Cave ...
Cave ecosystems thrive in the dark. What happens when tourists light them up?
In Belize’s Actun Tunichil Muknal cave, a sacred Maya site, plants grow in darkness, sparking concerns about how tourism affects its fragile ecosystem.
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Is This the Underground Everest?
Outside the cave, it’s a blistering ... the hall like galaxies of stars in a crystal clear night sky. Zhenya Tsurikhin climbs a free-hanging rope. Dark Star’s passages are deep underground ...