After a four-year closure, Crystal Cave is inviting visitors to "marvel at its underground splendor," Sequoia Parks ...

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

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

The island of Kastellorizo holds a natural wonder that remains one of the country’s best-kept secrets: the Blue Cave.