Crystal Cave, the ancient marble cavern at the end of a steep half-mile hike in Sequoia National Park, is slated to reopen to ...

Though these limestone caverns began forming 70 million years ago when ancient seas receded, they only became a tourist attraction in the late 19th century after two intrepid brothers investigated ...

"It became apparent that the injuries were severe and he would not be able to survive," said Carl O'Keeffe's sister Abigail Adams is a Human Interest Writer and Reporter for PEOPLE. She has been ...