Crystal Cave, nestled in California's Sequoia National Park, enchants visitors with its intricate marble rock formations, ...

After four years of closure, Crystal Cave is reopening this month in Sequoia National Park. Learn why it was closed, how to book a tour, and more.

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

At a site known as Natural Trap Cave, a team of scientists are rappelling down to uncover the secrets of what the Earth was ...