To see Niagara Cave, you have to book a guided tour. The tours are an hour long and involve a roughly 1-mile hike underground. As the tour begins, you'll descend around 100 steps down into the cave.

Beyond its urban centers of Pittsburgh and Philadelphia, one of Pennsylvania's most destination-worthy locations exists primarily under its surface. Located in Huntingdon, Pennsylvania, Lincoln ...

The stalactites and stalagmites of Sequoia National Park’s Crystal Cave, a sprawling subterranean wonder that’s been closed for four years, will be accessible again this summer.. But to get in ...

Jet, a flat-black, opaque gemstone derived from wood that has experienced extreme compression over millions of years, was the haute stone throughout the Victorian era, a time when fashion and ...

A cave explorer's tragic death 100 years ago led to the creation of a national park An explorer of the Mammoth Cave system in Kentucky who died 100 years ago is credited with the creation of the ...

A handful of esteemed designers have recently been embracing jet, incorporating the featherlight gemstone into fine jewelry pieces stocked by influential stores.