Researchers use a portable fluorescence spectrometer to analyze the glowing formations in underground caves. Now, researchers ...

Crystal Cave, the ancient marble cavern at the end of a steep half-mile hike in Sequoia National Park, is slated to reopen to visitors this summer after four years of closure. The cave features a half ...

Visitors can take a self-guided tour through chambers like the Witches Fireplace and Friendly Dragon, with electronic messages highlighting key features. The cave was mentioned in the B-movie It ...

The cave features multiple chambers and passageways and reportedly once contained a freshwater spring, which has since dried up due to declining groundwater levels, ILNA reported. Javad Nezamdoost, a ...