As we navigate the maze-like passages, we stumble upon a hidden cave deep within the mine, leading us into an incredible underground world. With ropes guiding the way, we descend into crystal ...

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 ...

“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.

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 ...

Crystal Cave, located in Sequoia National Park, will reopen to the public on May 23 after a four-year closure due to fire and weather damage. Visitors can purchase tickets for guided tours ...

This cave is so deep that it can accommodate 30 Qutub Minars and more... it is in... Caves have been part of the civilisation from the beginning of the formation of ...