Crystal Cave has been one of the most popular visitor destinations in the park since it opened for public tours in 1940.

The Blue Hole of Santa Rosa, for example, is an unassuming New Mexico lake that's actually ... to be the purest form of selenite crystal in the world. The Cave of the Crystals, or Cueva de los ...

Spooky, wonderous, stalactite-y: Crystal Cave in Sequoia National ... Scientists have discovered at least 40 new invertebrate species in caves since 1965, the National Park Service reported.

Before its closure, the cave was visited by an average of 51,000 people every summer. “The opening of Crystal Cave is a big step forward in disaster recovery for Sequoia and Kings Canyon ...

Like the majestic General Sherman tree, lush Crescent Meadow and the awe-inspiring Congress Trail, Crystal Cave has long been among the greatest visitor attractions at Sequoia National Park.