Visitors will be able to enjoy a half-mile loop through the narrow passages and steep sections of the stunning marble cavern ...

The stalactites and stalagmites of Sequoia National Park’s Crystal Cave, a sprawling subterranean wonder that’s been closed ...

For example, the marble Crystal Cave in Sequoia National ... you get a twofer: Onodaga Cave and Cathedral Cave. Tickets are available for tours of either or both. While Cathedral Cave is much ...

What may be less well-known is that Patagonia is home to a beautiful cave known as the marble cathedral. Image caption, Glacial waters help give the marble cathedral its turquoise glow Lago ...