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These Towering Crystal Structures Rising From Cave Floors Follow a Mathematical Rule With Precision

Called 'stalagmites,' these crystal structures hold the past record of the cave's geological history. The secret lies in ...
Los Angeles Times

This California cave is finally reopening. Here’s how to explore the underground wonder

The stalactites and stalagmites of Sequoia National Park’s Crystal Cave, a sprawling subterranean wonder that’s been closed for four years, will be accessible again this summer. But to get in during ...
WFMZ-TV

Historic Crystal Cave set to celebrate 150th anniversary of tours this weekend

RICHMOND TWP., Pa. - The historic Crystal Cave in Richmond Twp. near Kutztown is set to celebrate a milestone this weekend. Festivities for the 150th anniversary of its "grand illumination" will begin ...