The largest crystal found in the cave measures over ... and the resilience of life in harsh environments. While the cave’s ...

The Cave of Crystals is an underground cavern filled with tree-size gypsum crystals, including some of the largest natural ...

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 ...