I glance at my guide, Brian Kakuk—one of the world's foremost cave divers ... exist in pockets of liquid water deep beneath the surface of Mars or in a sea under the frozen crust of Jupiter's ...

Hidden beneath the water’s surface, these caves offer a unique beauty that few have the chance to witness. Imagine swimming ...

For example, the marble Crystal Cave ... to the "sea": the largest underground lake in the USA, discovered by a 13-year-old boy in 1905. The water is cold, clear, and about 70 feet deep.

The caves covered in crystal formations surround a 55-foot deep lake. Today, bridges run throughout the caves allowing visitors to descend deep into the darkness and witness the magnificent beauty ...

Crystal-clear droplets break on my shoulders ... standing directly underneath the mouth of Fern Grotto Beach’s sea cave. The cave is carved into the beach’s sandstone cliffs, just below ...

“The deep sea, outer space, and caves: Those are the only frontiers left,” says Coons, who does his exploring in a lightweight helmet with a small flashlight duct-taped to the brim.

Discovered in 1999 inside an abandoned mine in Southern Spain, Pulpí Geode is the largest crystal 'cave' of its kind in ... of iron dioxide in Canada, a deep dive in Ed Burtynsky's work.

The caves once existed above the water line, but were flooded when sea levels rose. Deep within these underwater caves are formations which can only be formed in dry caves - spectacular sculptural ...

travelers venture into the gaping mouth of the cave by wading in chest-deep water. Inside, you'll squeeze through cracks and crevices to enter the sacred chamber that houses the "Crystal Maiden." ...

Crystal Cave, the ancient marble cavern at the end of a steep half-mile hike in Sequoia National Park, is slated to reopen to visitors this summer after four years of closure.The cave features a ...